Vehicles using electric/front EM780 engine list:

Engine electric/front EM780

Symptoms:
- Reduced power output or loss of acceleration
- Warning lights on the dashboard related to the electric drive system
- Unusual noises or vibrations from the front electric motor
- Inconsistent regenerative braking performance
- Overheating warnings or thermal derating during heavy use

Diagnosis:
- Perform a full system scan using Mercedes-Benz diagnostic tools to check for fault codes related to the EM780 motor and inverter
- Inspect electrical connections and wiring harnesses for corrosion, damage, or loose contacts
- Check the motor temperature sensors and cooling system functionality to rule out thermal issues
- Test the inverter and power electronics for faults or degraded components
- Verify software and firmware versions are up to date to ensure optimal motor control

Fixes:
- Replace or repair damaged wiring and connectors to restore proper electrical flow
- Service or replace faulty temperature sensors and ensure cooling system integrity to prevent overheating
- Update the vehicle’s software to the latest version to address known bugs or improve motor management
- If inverter or motor components are defective, replace them with genuine Mercedes-Benz parts
- Reset fault codes after repairs and perform a test drive to confirm resolution

Prevention:
- Regularly service the vehicle according to Mercedes-Benz maintenance schedules, including checks on the electric drive system
- Keep the cooling system clean and functioning to avoid thermal stress on the motor and inverter
- Avoid aggressive driving styles that can cause excessive heat buildup in the electric motor
- Ensure software updates are applied promptly to maintain system reliability and performance
- Inspect electrical connections periodically for signs of wear or corrosion, especially in harsh environments

By following these diagnostic and maintenance guidelines, owners of Mercedes-Benz vehicles equipped with the EM780 front electric motor can minimize downtime and maintain optimal performance.