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This guide is for general information only. EVcourse is not affiliated with BMW or Mer. Charging speeds and compatibility vary by station, vehicle variant, and conditions. When in doubt, contact BMW or Mer support.

Troubleshooting

BMW i7 Charging at Mer

Updated March 2026

The BMW i7 is compatible with Mer chargers. Here is what you need to know about charging speed, connector fit, and how to handle common problems.

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Compatibility Overview

Approximate values. Actual speeds depend on temperature, battery state, and station load.

Connector match
Compatible
Car connector
CCS2
Network connectors
CCS2
Max charging speed
195 kW
10-80% estimate
31 min
Payment
app, RFID, contactless

Why Your Charging Speed May Differ

The BMW i7 supports up to 195 kW DC charging. Mer chargers deliver up to 300 kW. Your car's maximum intake is the limiting factor here, capping speed at 195 kW even on a faster charger.

  • Charging slows down above 80% state of charge on most EVs, including the BMW i7.
  • Cold weather reduces charging speed. The BMW i7 supports battery preconditioning, which helps.
  • If multiple cars share the same Mer station, power may be split between stalls.

BMW i7 Charging Problems

BMW i7 Charger Won't Start: Step-by-Step Fix Guide

You have connected your BMW i7 to a public charger, but the session refuses to start. No charging indicator, no power, just frustration. This is a common issue that usually comes down to authentication, cable seating, or charger status. Here is what to check.

Symptoms

  • Charger display shows 'waiting for vehicle' despite the cable being connected
  • iDrive does not indicate any charging activity
  • The i7's charge port LED stays off or flashes red
  • The CCS2 connector does not lock into the port
  • An error message appears on the charger screen after plugging in

What to Do

  1. 1

    Unlock the car and open the charge port

    Ensure the i7 is unlocked. Press the charge port flap on the rear right side to open it. Some i7 models also let you open it through the My BMW app.

  2. 2

    Insert the connector until it clicks

    Push the CCS2 or Type 2 connector straight into the port firmly. You should hear a click when it locks. The i7's port LED should illuminate once the connection is established.

  3. 3

    Authenticate at the charger

    Tap your RFID card on the reader, start the session in your charging app, or use contactless payment at the terminal. Wait for the charger to confirm before expecting power flow.

  4. 4

    Disable scheduled charging

    In iDrive, navigate to Charging Settings. If departure time or a schedule is set, switch to Charge Immediately. This ensures the i7 starts as soon as the charger is ready.

  5. 5

    Disconnect and retry

    Remove the cable, wait 15 seconds, and reconnect. This resets the communication protocol between the i7 and the charger.

  6. 6

    Try another charger

    If nothing resolves the issue, the charger is likely faulty. Move to a different stall or station and report the broken unit through the network's app.

BMW i7 Charging Payment Failed: How to Resolve Fast

Your BMW i7 is plugged in at a public charger, but the payment will not go through. RFID card not recognized, app error, or bank card declined. This is not a car issue, but it blocks your charging session all the same. Here is how to work through it.

Symptoms

  • The charger shows 'authentication failed' after tapping your RFID card
  • Your charging app displays a payment error when starting a session
  • Contactless bank card is declined at the charger terminal
  • The charger prompts for payment but none of your methods work
  • A session starts then immediately cancels due to a billing issue

What to Do

  1. 1

    Try an alternative payment method

    Switch from RFID to the charging app, or from the app to contactless bank card. Most chargers accept at least two payment methods.

  2. 2

    Check your account and card details

    Open your charging app and verify the linked payment method is current. For prepaid accounts, ensure your balance covers the session.

  3. 3

    Verify the charger accepts your provider

    Look at the charger for logos of accepted networks. If yours is not listed, you need ad-hoc payment or a different card.

  4. 4

    Use the QR code for ad-hoc payment

    Scan the QR code on the charger with your phone camera. This opens a browser-based payment page where you can pay with any credit or debit card, no app required.

  5. 5

    Restart the authorization

    Cancel any pending session in the app and start fresh. Sometimes the first authorization attempt fails but a second one succeeds.

  6. 6

    Contact the network's support line

    Most chargers display a phone number for the operator. They can sometimes authorize a session on their end or identify the specific payment issue.

BMW i7 xDrive60 Charging Slow: Causes and Solutions

Your BMW i7 xDrive60 has a large 101.7kWh battery and supports up to 195kW DC fast charging. But if the numbers on iDrive are disappointing, you are not alone. Several factors can limit the i7's charging speed, and knowing what to look for helps you get the most out of every stop.

Symptoms

  • DC fast charging power shown in iDrive is well below 195kW
  • The large 101.7kWh battery takes much longer than expected to charge
  • Charging curve drops off steeply after 40-50%
  • AC charging speed is limited to 11kW despite using a faster station
  • A temperature or battery conditioning message appears in iDrive

What to Do

  1. 1

    View charging details in iDrive

    The iDrive display shows current kW, battery temperature, and time remaining. Check whether the car or the charger is the bottleneck by comparing the current kW to the charger's rated output.

  2. 2

    Precondition before every fast charge

    Enter the charging station as a destination in iDrive. The i7's thermal management will bring the battery to the ideal temperature range while driving. This is the single biggest factor in cold weather charging speed.

  3. 3

    Find chargers rated 200kW or above

    Use the My BMW app or a charger map to locate high-power stations. Ionity and Fastned locations typically offer 300kW+ chargers that let the i7 reach its peak.

  4. 4

    Choose an unoccupied charger pair

    If the station has paired stalls, pick one where the adjacent stall is empty. This avoids power sharing and gives your i7 full access to the charger's output.

  5. 5

    Charge between 10% and 80%

    Plan stops to arrive between 10% and 15% and leave around 80%. The i7's large battery means even 80% gives you substantial range, and you avoid the slow tail end of the charging curve.

  6. 6

    Check for OTA software updates

    BMW releases over-the-air updates that can improve charging behavior. Go to Settings, then Software Update in iDrive to check for and install any available updates.

Common Mer Issues

Station occupancy not updating in the app

The Mer app shows a station as available, but when you arrive, all connectors are occupied or out of service. The real-time status in the app can lag behind by several minutes.

Symptoms

  • App shows "Available" but all connectors are in use when you arrive
  • App shows a station as occupied but the chargers are visibly free
  • Connector status flickers between available and occupied in the app
  • Recently freed connectors still show as "In use" in the app for several minutes

How to Fix It

  1. 1

    Pull to refresh the station detail in the Mer app

    On the station page, pull down to force a status refresh. The app does not always update automatically, and a manual refresh often shows the correct status.

  2. 2

    Close and reopen the app

    Force-close the Mer app and reopen it. This clears any cached station data and pulls a fresh status from the server.

  3. 3

    Check a third-party app for a second opinion

    Apps like Plugsurfing, A Better Route Planner, or Google Maps sometimes pull fresher data from Mer's backend. Use one of these to verify availability if the Mer app seems wrong.

  4. 4

    Drive to the station if it is nearby

    If the station is less than five minutes away, it is often faster to just go and check. Occupancy can change in the time it takes to troubleshoot the app.

Third-party RFID card rejected

You are trying to authenticate with an RFID card from a roaming provider like Plugsurfing, NewMotion, or Virta, but the Mer charger rejects it. Not all third-party RFID cards are accepted at every Mer station.

Symptoms

  • Charger screen shows "Card not recognized" after tapping
  • The charger beeps once but nothing happens
  • Your RFID card works at other networks but fails at Mer
  • The charger prompts you to try again but repeated taps do not help

How to Fix It

  1. 1

    Hold the card flat against the reader for three full seconds

    Do not tap and remove quickly. Some Mer readers need a longer hold to register the card. Keep it pressed flat against the RFID symbol.

  2. 2

    Check if your roaming provider covers Mer stations

    Open your roaming provider's app and search for this specific Mer station. Some providers have roaming agreements with Mer but not for every station type or region.

  3. 3

    Use the Mer app instead

    Download the Mer app if you do not have it. Create an account and add a payment method. You can start the session through the app even if your RFID card does not work.

  4. 4

    Try contactless bank card payment

    Newer Mer stations have a contactless payment terminal. Look for a card reader with the contactless payment symbol. Tap your bank card or phone to start.

  5. 5

    Try a Mer-issued RFID card for future visits

    You can order an RFID card directly from Mer through their app or website. Mer's own cards are accepted at all Mer stations without roaming issues.

Charger screen showing error but no error code

The charger screen displays a generic error message like "Error" or "Fault" without any specific code or explanation. This makes it hard to know if the problem is temporary or if the unit is broken.

Symptoms

  • Charger screen shows "Error" or a red warning icon with no further detail
  • The error appears before you even try to authenticate
  • The error appears after plugging in but before power delivery starts
  • Screen alternates between the normal start screen and the error message

How to Fix It

  1. 1

    Unplug the connector and wait 30 seconds

    Some Mer chargers show transient errors after a previous session ended abnormally. Unplugging and waiting gives the charger time to reset its internal state.

  2. 2

    Try the other connector on the same unit

    If the station has a second CCS2 connector, try that one. A hardware fault on one connector does not always affect the other.

  3. 3

    Check if other cars are successfully charging at the station

    If nobody at the station is charging, the entire station may be down. If others are charging fine, the issue is limited to your connector.

  4. 4

    Report the faulty unit in the Mer app

    Open the Mer app, find the station, and report the issue. Include which connector number has the error. This helps Mer send a technician and warns other drivers.

  5. 5

    Move to a different station

    A charger with a persistent generic error is unlikely to start working on its own. Use the Mer app to find the nearest alternative station.

Cable locked and will not release in cold weather

You finished charging but the CCS2 cable will not unlock from your car. In Nordic winters, ice can form around the connector locking mechanism, making it physically difficult to release.

Symptoms

  • Pressing the connector release button does not unlock the cable
  • The connector feels frozen in place
  • Your car shows "Charging complete" but the cable is stuck
  • The locking pin on the connector is visibly iced over

How to Fix It

  1. 1

    Make sure the charging session has fully ended

    The cable stays locked while a session is active. Stop the session in the Mer app or on the charger screen, then try releasing the connector again. Wait 10 seconds after the session ends.

  2. 2

    Try unlocking from your car

    Most EVs have a cable release option in the infotainment system or a button near the charge port. Use your car's unlock function rather than the connector button.

  3. 3

    Warm the connector gently

    If ice is the problem, pour lukewarm water (not boiling) over the connector and charge port area. You can also cup your hands around the connector to warm it with body heat. Do not use force or tools to pry it free.

  4. 4

    Run the car's cabin heater for a few minutes

    Turning on the car's climate system can gradually warm the charge port area from the inside. This works slowly but can free a mildly frozen connector after 5-10 minutes.

  5. 5

    Call Mer support if the cable is truly stuck

    If nothing works after 15 minutes, call the support number on the charger. Mer can remotely release the cable lock on their end. Do not pull with excessive force as this can damage both the connector and your car's charge port.

App requires location services for remote start

The Mer app asks you to enable location services before you can start a charging session, even when you are standing right next to the charger and selected it manually from the map.

Symptoms

  • App shows "Enable location services to start charging" popup
  • Start button is grayed out until location permission is granted
  • The app worked fine before but now demands location after an update
  • You can browse the map but cannot start a session without GPS enabled

How to Fix It

  1. 1

    Enable location services temporarily

    Go to your phone's settings, find the Mer app, and set location access to "While Using the App." You can change it back after your session.

  2. 2

    Make sure GPS has a fix

    In underground parking garages or areas with poor GPS reception, the app may not be able to confirm your location. Step outside or move closer to an open area until the app detects your position.

  3. 3

    Use RFID or contactless payment instead

    If you do not want to share your location, use your RFID card or a contactless bank card to start the session. These methods do not require the app at all.

  4. 4

    Scan the QR code on the charger

    Some Mer chargers have a QR code that opens the start process in a browser, bypassing the app's location requirement.

Former Grønn Kontakt station not found in Mer app

Mer acquired Grønn Kontakt in Norway, but some older stations may not appear correctly in the Mer app, especially during the transition period.

Symptoms

  • Station visible on the street but not on the Mer app map
  • Searching by the old Grønn Kontakt name returns no results
  • QR code on the charger links to a Grønn Kontakt page that no longer works
  • RFID card from Grønn Kontakt account rejected

How to Fix It

  1. 1

    Update the Mer app to the latest version

    Older versions of the app may not include recently migrated Grønn Kontakt stations. Update from the App Store or Google Play.

  2. 2

    Search by the station's physical address

    Instead of searching by station name, try the street address or zoom into the location on the app map. The station may appear under a new Mer name.

  3. 3

    Enter the charger ID manually

    Look for a station or connector ID printed on the charger hardware. Enter this ID in the Mer app's manual start option.

  4. 4

    Use contactless payment to bypass the app

    If the station has a payment terminal, tap your bank card to start. This works independently of whether the app has the station listed.

Mer App Tips

  • Add a payment method to the Mer app before your first charging session. The app will not let you start a session without a valid payment card on file.
  • Use the filter options in the Mer app to show only stations with available CCS2 connectors. This saves time when you need a fast charger specifically.
  • If the Mer app crashes during a session, your charging will continue. The session runs on the charger, not on your phone. Reopen the app to monitor progress or stop the session.
  • Check the Mer app for pricing before you plug in. Prices vary between stations and can include per-kWh rates, time-based fees, or both. The station detail page shows the current pricing.

Payment Tips

  • Contactless bank card payment is available at newer Mer stations but not all locations. The Mer app shows which payment methods each station supports on the station detail page.
  • Mer accepts Visa and Mastercard through the app. Some prepaid cards and virtual cards may be declined. Use a standard debit or credit card for the most reliable experience.
  • If you charge through a roaming provider like Plugsurfing, check that provider's pricing for Mer stations. Roaming fees can add a significant markup over Mer's direct prices.
  • Mer's app shows your full charging history with costs. If a session was billed incorrectly, you can dispute it through the app's history section.

Frequently Asked Questions

Can the BMW i7 charge at Mer?
Yes. The BMW i7 uses a CCS2 connector, which is supported by Mer chargers. Maximum charging speed will be up to 195 kW.
How long does it take to charge a BMW i7 at Mer?
Charging a BMW i7 from 10% to 80% at Mer takes approximately 31 minutes at up to 195 kW. Actual times vary depending on temperature, battery condition, and station load.
How do you pay at Mer?
Mer accepts app, RFID, contactless. Check the Mer app or website for current pricing and subscription options.

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