E17
Mercedes-Benz
Internal Energy Meter Fault
Wallbox shows E17; charging is disabled; may be linked to integrated energy meter issues.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Defective integrated kWh meter in Mercedes-Benz wallbox, Communication failure between meter and control board, Calibration error detected by firmware
How to Fix / Troubleshooting
Safety first: Isolate power before accessing internal meter wiring.
- Check meter display (if present): Some wallboxes have a visible meter display. Verify if it powers on and shows plausible readings.
- Inspect communication cable: Inside the wallbox, locate the communication link (e.g., RS-485) between the meter and control board. Ensure connectors are secure.
- Reset the unit: Power-cycle the wallbox to see if the meter reinitializes correctly.
- Meter replacement: If the meter remains unresponsive or E17 persists, the integrated meter module may need replacement and recalibration by an authorized technician.
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Repair Difficulty
Hard
4/5
Required Part
Integrated Energy Meter Module
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