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Troubleshooting

Mercedes-Benz EQS Charging Troubleshooting

Updated March 2026

Mercedes-Benz EQS Charging Specs

Approximate values. Check your own vehicle specs, as they vary by variant, model year, and market.

Battery (useable): 118 kWh
Max DC charging: 200 kW
Max AC charging: 11 kW
10-80% DC time: 33 min
DC connector: CCS2
WLTP range: 823 km
Heat pump: standard
Architecture: 400V

Mercedes-Benz EQS Charger Won't Start a Session

You connected the CCS2 cable to your EQS's right rear charge port, but the Hyperscreen shows no charging activity. No power flowing, no progress. This is frustrating, especially in a flagship sedan where everything should just work. The cause is usually authentication, cable seating, or the charger itself, not the EQS.

Quick Diagnosis

Step 1

Is the charger screen on and showing a ready state?

Check if the charger display is lit and showing "Available" or a similar ready message.

Symptoms

CCS2 connector plugged in but the Hyperscreen shows no charging activity
Charger screen displays an error or stays idle after authentication attempt
Plug & Charge does not authenticate automatically at a supported station
Charge port LED does not illuminate or blinks an error pattern
Mercedes me app shows the EQS as connected but not charging

Why This Happens

Plug & Charge authentication failed

The EQS supports Plug & Charge, but the feature must be activated in the Mercedes me app with a valid payment method linked to Mercedes me Charge. If the charging network does not support Plug & Charge, or there is a certificate mismatch, authentication will fail silently. You will need an alternative method.

CCS2 cable not fully seated in the charge port

The EQS charge port is on the right rear. The CCS2 connector is large and heavy. It must click firmly into place for the car to lock the cable and start communication. If inserted at an angle, it may seem connected but the pins are not engaged properly.

Scheduled charging active in MBUX

The EQS has sophisticated charging scheduling through MBUX and the Mercedes me app. If a departure time is set, the car may connect but delay charging to finish at the scheduled time. This makes sense for home charging but causes confusion at public stations.

Charger hardware or software fault

Public chargers fail more often than you might expect. A charger can appear fully operational on its screen but have a faulty contactor, a software hang, or a damaged cable. The EQS will not start charging if the charger cannot complete the handshake.

12V battery too low for charge communication

The EQS uses its 12V auxiliary battery to power the charging communication modules. If the 12V battery is deeply discharged (common if the car has been sitting unused for weeks), the charge port may not respond at all. The Hyperscreen may still work but charging communication may fail.

What to Do

1

Remove and firmly reseat the CCS2 connector

Pull the connector out of the right rear charge port. Check for debris or moisture. Push it back in straight and firm until you hear a click and see the charge port LED respond. The CCS2 connector is heavy, so support it with both hands to ensure proper alignment.
2

Authenticate manually if Plug & Charge failed

Open the charging network's app and start the session by scanning the QR code or selecting the charger. If you have an RFID card for this network, tap it on the reader. Do not wait for Plug & Charge if it did not work within 30 seconds.
3

Disable scheduled charging in MBUX

On the Hyperscreen, open Settings, then Charging. Turn off any departure time or scheduled charging window. At a public charger, you want charging to start immediately. Re-enable scheduled charging when you are back at your home wallbox.
4

Lock and unlock the EQS to reset the charge controller

Use the key or Mercedes me app to lock the car. Wait 15 seconds, then unlock. This resets the charge port locking mechanism and the onboard charging communication module. Reconnect the cable after unlocking.
5

Try a different connector or charger at the station

If the station has multiple CCS2 connectors, try a different one. If the entire station seems unresponsive, use MBUX navigation to find another nearby charger. Report the faulty charger through the network's app.

Prevention Tips

Keep Plug & Charge activated in the Mercedes me app with a current payment method as your primary authentication
Carry at least one RFID card and have one charging app installed as backup authentication methods
Disable scheduled charging before road trips so public sessions start immediately
If the EQS sits unused for more than two weeks, check that the 12V battery has sufficient charge
Clean the charge port area regularly, particularly in winter when road salt accumulates

Mercedes-Benz EQS Charging Stops Before Target SOC

Your EQS was charging smoothly, then it stopped at 55% with no warning. Or a DC session cut out after 20 minutes. With a 118 kWh battery, an interrupted session can mean a long wait to find another charger and start over. The cause is usually a charge limit setting, charger communication, or battery temperature management.

Quick Diagnosis

Step 1

Did the charger show an error code?

Check the charger screen for any error message or code.

Symptoms

DC fast charging stops before reaching your target percentage
The Hyperscreen shows charging complete but battery is well below 100%
Session ends after a few minutes with an error on the charger display
Charge port LED goes dark mid-session without any notification
Mercedes me app sends an alert that charging has stopped unexpectedly

Why This Happens

Charge limit set in MBUX or Mercedes me app

The EQS allows you to set a maximum charge level through the Hyperscreen or the Mercedes me app. If it is set to 80% (recommended for daily use), charging stops there. With 118 kWh, 80% still gives you roughly 460 km of range, which is enough for most days.

Battery temperature protection triggered

The EQS's 118 kWh battery generates significant heat during fast charging at 200 kW. If the battery management system detects temperatures approaching the upper limit, it will reduce power or stop the session entirely to protect cell health. This is more likely on hot days or after sustained high-speed driving.

Charger communication lost

The EQS and the charger exchange data continuously throughout the session. If communication drops for more than a few seconds, the charger will terminate the session as a safety precaution. Older or poorly maintained chargers are more prone to this.

Session time or energy limit on the charger

Some chargers impose a maximum session duration (often 60 minutes) or energy limit. With a 118 kWh battery, you may hit these limits before the battery is full, especially if charging from a low state of charge.

Ground fault detected by the charger

Chargers have safety systems that monitor for ground faults and insulation issues. If a fault is detected, the charger cuts power immediately. This can happen due to moisture, cable damage, or the charger's own hardware issues.

What to Do

1

Check the charge limit on the Hyperscreen

Open the charging settings on the Hyperscreen. If the charge limit is set to 80% and the battery stopped there, the EQS is working as designed. Increase the limit only if you genuinely need the extra range. Charging the full 118 kWh to 100% takes considerably longer due to the taper above 80%.
2

Read any error messages on the charger display

Walk to the charger and check its screen. Note any error codes or messages. Common issues include communication timeouts, ground fault alerts, and session duration limits. This information is useful when reporting the issue to the network operator.
3

Unplug, wait 60 seconds, and restart

Remove the CCS2 connector from the right rear port. Wait a full minute for both the charger and the EQS to clear their communication state. Reconnect and authenticate again. Many intermittent communication errors resolve after a clean restart.
4

Check battery temperature on the Hyperscreen

If the Hyperscreen indicates high battery temperature, wait 10-15 minutes before restarting the session. Park in shade if possible. On the next trip, use MBUX navigation to precondition the battery and manage its temperature before arriving at the charger.
5

Check for session limits in the charging app

Open the network's app and review the station details. Some locations limit sessions to a set time or energy amount. With a 118 kWh battery, you may hit energy limits that would not affect cars with smaller batteries. You can start a new session after the limit.
6

Try a different charger if the problem repeats

If restarting does not help, move to another charger. If charging stops unexpectedly across multiple chargers over several days, contact Mercedes-Benz service through the Mercedes me app. A single incident at one charger is almost always the charger's fault.

Prevention Tips

Set a charge limit of 80% for daily use to protect the 118 kWh battery and avoid the slow taper above that level
Use MBUX navigation to precondition the battery and manage temperature before arriving at fast chargers
Avoid DC fast charging immediately after sustained driving above 150 km/h in warm weather
Check session time and energy limits in the charging network's app before starting, especially for long sessions
Keep Mercedes me app notifications enabled to get immediate alerts when charging stops

Mercedes-Benz EQS Payment Failed at Charging Station

You are standing next to your EQS at a public charger and payment will not go through. Plug & Charge did not activate, the app shows an error, or your card was declined. Payment failures are one of the most common reasons charging sessions do not start. With the EQS, you have multiple authentication options to try before giving up.

Quick Diagnosis

Step 1

Are you using the network's own app?

Using the charging network's own app is usually the cheapest and most reliable option.

Symptoms

Plug & Charge does not authenticate when the CCS2 cable is connected
Contactless card declined at the charger's payment terminal
Mercedes me Charge or the network's app shows a payment error
RFID card not recognized by the charger reader
Session starts but stops immediately with a billing-related error

Why This Happens

Plug & Charge not activated or certificate issue

The EQS supports Plug & Charge, but it requires activation in the Mercedes me app with a valid payment method linked to Mercedes me Charge. Plug & Charge uses digital certificates, and occasionally a certificate mismatch between the car and charger prevents authentication. Not every network supports Plug & Charge.

Payment method expired or pre-authorization declined

Charging networks place a pre-authorization hold (typically 30-100 EUR) on your payment method before starting a session. If your card has expired, has insufficient funds for the hold, or your bank blocks the transaction, the session will not start.

Charging network does not support your payment method

Not all networks accept all payment methods. Your RFID card or app account may work on one network but not roam to another. Mercedes me Charge covers many European networks through roaming agreements, but coverage is not universal.

Charger's contactless terminal offline

The contactless card reader on a charger can be out of service while the charger itself is functional. This is a hardware issue on the charger side. The EQS cannot fix a broken payment terminal.

Mercedes me Charge account sync issue

Changes to your Mercedes me Charge account (new payment method, address change) can take time to sync to the car's Plug & Charge certificate. If you recently updated your account, the EQS may still have outdated credentials.

What to Do

1

Try Plug & Charge by connecting the cable

Plug the CCS2 connector into the EQS's right rear charge port. Wait up to 30 seconds for Plug & Charge to authenticate. Check the Hyperscreen for a charging confirmation. If nothing happens after 30 seconds, Plug & Charge is not working at this station.
2

Use the charging network's app to start the session

Open the app for the charging network shown on the charger. Scan the QR code or enter the charger ID. Start the session through the app. Verify your payment method in the app is valid and not expired.
3

Try contactless payment at the charger terminal

If the charger has a contactless payment terminal, tap your bank card, Apple Pay, or Google Pay. If the first card is declined, try a different one. Some terminals accept only certain card brands.
4

Verify your Mercedes me Charge account

Open the Mercedes me app. Go to Charge settings and check that Plug & Charge is enabled and your payment method is current. If you recently changed your payment method, it may need time to sync. Try restarting the Mercedes me app.
5

Try a different RFID card or roaming provider

If you carry multiple RFID cards, try another network. Roaming providers with broad European coverage (Chargemap, Maingau, Shell Recharge) can fill gaps where Mercedes me Charge does not reach.
6

Find an alternative charger nearby

If payment fails on this charger entirely, use the Hyperscreen to find another station nearby. A different charging network may accept your payment method. Filter by the networks you know work with your cards.

Prevention Tips

Keep Plug & Charge activated in Mercedes me with an up-to-date payment method as your primary option
Carry at least two RFID cards from different networks as backup authentication
Make sure your bank card allows pre-authorization holds of at least 100 EUR for charging
Download the apps for major charging networks in your region before you need them at the station
After updating payment details in Mercedes me, allow a day for Plug & Charge certificates to sync

Mercedes-Benz EQS Charging Slower Than Expected

You plugged in your EQS at a 300 kW charger expecting close to 200 kW, but the Hyperscreen shows 50 kW. Or your home wallbox is stuck at 3.6 kW instead of 11 kW (or 22 kW if you have the optional upgrade). The EQS has a huge 118 kWh battery that can take a while to warm up. Slow charging is almost always temperature, state of charge, or the charger, not a defect.

Quick Diagnosis

Step 1

Is your battery above 80%?

Charging slows down significantly above 80% to protect battery health. This is normal.

Symptoms

DC fast charging speed well below the 200 kW maximum shown on the Hyperscreen
AC charging stuck at 3-4 kW instead of 11 kW or 22 kW
Charging speed drops sharply after reaching 50-60% state of charge
Charging session starts at reasonable speed but slows within minutes
The 118 kWh battery takes significantly longer to charge than expected

Why This Happens

Battery too cold or too hot

The EQS has a 118 kWh NMC battery on a 400V architecture. This large pack takes longer to reach optimal temperature than smaller batteries. Below 15°C, the car significantly limits DC charging speed. Use MBUX navigation to route to the charger so the EQS preconditions the battery. The heat pump helps, but a cold 118 kWh pack needs time.

State of charge above 50-60%

The EQS has a generous charging curve, but 200 kW is only available in the lower state of charge range. Above 50%, power starts tapering. Above 80%, you may see 50 kW or less. With 118 kWh, even at lower speeds the car is still adding kilometers quickly.

Preconditioning did not activate

The EQS preconditions its battery when you route to a charger through MBUX navigation. Without nav routing, the battery may arrive at the charger cold. Given the 118 kWh pack size, this can mean 15-20 minutes of reduced charging speed while the battery warms up.

Charger cannot deliver 200 kW

Many DC fast chargers are rated at 50-150 kW. The EQS can pull 200 kW, but only if the charger can supply it. Power sharing between stalls is common. Check the charger's rated output before expecting the EQS's maximum speed.

AC charging limited by equipment or optional onboard charger

The EQS comes standard with an 11 kW onboard AC charger. The optional 22 kW charger requires a 3-phase 32A wallbox to deliver full speed. If your wallbox is single-phase, you will get about 3.7 kW regardless of which onboard charger you have.

What to Do

1

Route to the charger using MBUX navigation

Enter the charging station as your destination on the Hyperscreen or MBUX. This activates automatic battery preconditioning for the 118 kWh pack. The EQS will display a preconditioning notification. Given the large battery, start routing at least 20-30 minutes before arrival for maximum benefit in cold weather.
2

Check your state of charge before expecting peak speed

The EQS reaches 200 kW only at lower state of charge levels. For the fastest DC charging, arrive between 10-20%. If you are above 60%, the speed reduction is normal. With 580 km of range, you often do not need to charge above 80% on road trips.
3

Verify the charger can deliver the speed you expect

Check the charger's rated output on the unit itself or in the charging app. A 50 kW charger will never give your EQS more than 50 kW. Look for chargers rated 150 kW or higher to take advantage of the EQS's capabilities. Avoid stalls paired with another vehicle.
4

Check AC charging settings and wallbox compatibility

Open the charging settings in MBUX. Confirm the charge current is set to maximum. If you have the optional 22 kW onboard charger, verify your wallbox is 3-phase 32A. For the standard 11 kW charger, you need at least 3-phase 16A.
5

Check if Plug & Charge negotiated the correct power

The EQS supports Plug & Charge. Occasionally, authentication issues cause the charger to default to a lower power tier. Unplug from the right rear charge port, wait 30 seconds, and reconnect. Check MBUX for any authentication errors.
6

Try a different charger

If the speed is still low after checking all settings, try a different charger. Some chargers degrade over time. Use MBUX navigation or the Mercedes me app to find a high-power charger (150 kW+) nearby.

Prevention Tips

Always route to chargers through MBUX navigation, especially important for the large 118 kWh battery pack
Plan charging stops to arrive between 10-20% for peak DC speeds on the EQS
Choose chargers rated 150 kW or higher to take advantage of the EQS's 200 kW capability
If you ordered the optional 22 kW onboard charger, make sure your home wallbox supports 3-phase 32A
Use the Mercedes me app to check charging status and adjust settings remotely

Mercedes-Benz EQS Wrong Connector or Plug Won't Fit

You are at a charging station and the connector does not fit your EQS. Or there are several cables hanging from the charger and you are unsure which one works. The EQS uses the European CCS2 standard for DC fast charging and Type 2 for AC, both through a single port on the right rear of the car.

Quick Diagnosis

Step 1

Do you need fast charging (DC)?

DC fast charging is for quick top-ups during trips (usually 20-40 minutes). For overnight or workplace charging, AC is fine.

Symptoms

The connector at the station does not physically fit the EQS charge port
Multiple cables on the charger and you are unsure which to use
A CHAdeMO connector is the only DC option at this station
The Type 2 AC cable does not lock into the charge port
You found a Tesla Supercharger and wonder if it works with the EQS

Why This Happens

Attempting to use a CHAdeMO connector

CHAdeMO is a Japanese DC fast charging standard with a large round connector. The EQS does not support CHAdeMO. If the station only has CHAdeMO for DC, you cannot fast charge your EQS there. You need a CCS2 connector.

Tesla proprietary connector at older Superchargers

Some older Tesla Superchargers use a proprietary connector that does not fit the EQS. However, newer Tesla Superchargers across Europe use CCS2 and are compatible with the EQS. You may need to authenticate through the Tesla app and check that the location is open to non-Tesla vehicles.

Type 1 AC connector instead of Type 2

Type 1 is a 5-pin single-phase AC connector used primarily in North America and Japan. The EQS uses Type 2 (7-pin), the European standard. Type 1 cables will not fit the EQS charge port.

Connector not aligned properly

Both CCS2 and Type 2 connectors have a flat edge on top for alignment. If you try to insert them rotated or at an angle, they will not fit. The CCS2 connector is particularly large and heavy, so proper alignment matters. It should slide in smoothly when oriented correctly.

Charge port frozen or obstructed

In winter, ice can form around the charge port door or inside the port on the right rear of the EQS. Road debris can also accumulate. This makes it seem like the connector does not fit when the port itself is the problem.

What to Do

1

Identify the correct connector for the EQS

The Mercedes-Benz EQS uses CCS2 (Combined Charging System 2) for DC fast charging and Type 2 for AC charging. Both connect through the same port on the right rear. The CCS2 connector has the Type 2 section on top plus two large round DC pins below. For AC-only sessions, use just the Type 2 portion.
2

Check which connectors the charger has

DC fast chargers in Europe typically have CCS2 (compatible with the EQS) and sometimes CHAdeMO (not compatible). AC destination chargers have either a Type 2 socket (you bring a cable) or a tethered Type 2 cable. The EQS works with CCS2 and Type 2.
3

Align and insert the connector correctly

Hold the connector with the flat edge facing up. Push it straight into the charge port, not at an angle. The CCS2 connector is heavy, so use both hands. You should feel it slide in and hear a click when the EQS locks the cable in place.
4

Clear any obstructions from the charge port

If the connector will not seat properly, check for ice, snow, or road debris in the charge port. In winter, lukewarm water (not boiling) can melt ice. Wipe the port clean with a soft cloth. Never insert tools or hard objects into the charge port.
5

Find a compatible charger nearby

If this station does not have a connector your EQS can use, open MBUX navigation or the Mercedes me app to find a CCS2 station nearby. The Hyperscreen can filter for compatible chargers and show real-time availability along your route.

Prevention Tips

The EQS uses CCS2 for DC and Type 2 for AC, both through the right rear charge port
Use MBUX navigation or Mercedes me app to find compatible CCS2 chargers before you arrive
Keep the charge port area clean and free of ice, especially during winter months
Carry your own Type 2 cable for AC charging at destination chargers with untethered sockets
Tesla Superchargers with CCS2 work with the EQS, but verify the station is open to non-Tesla vehicles first

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