Removing the auxiliary battery
WARNING:
High-voltage system
.
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!
- All work on the high-voltage system may only be carried out by specially trained and technically experienced personnel.
- For additional information see: SAFETY INSTRUCTIONS ON HANDLING HYBRID CARS .
- For additional information see: NOTES ON REPAIR OF HIGH-VOLTAGE BATTERY UNIT .
WARNING:
System failure (eg steering support)
Mortal hazard due to system failure
Mortal hazard due to system failure
- It is mandatory to replace the vehicle battery when replacing the 12 V battery in G05, G20 and G21 PHEV vehicles.
NOTE:
TECHNICAL INFORMATION
Zero voltage (high-voltage system switched-off) is only displayed with in PAD mode.
Zero voltage (high-voltage system switched-off) is only displayed with in PAD mode.
NOTE:
TECHNICAL INFORMATION
When replacing the starter battery in G05. G20 and G21 PHEV vehicles, the condition of the on-board battery is checked as part of the starter unit battery diagnosis/registration process. Depending on results, the system battery must be replaced.
When replacing the starter battery in G05. G20 and G21 PHEV vehicles, the condition of the on-board battery is checked as part of the starter unit battery diagnosis/registration process. Depending on results, the system battery must be replaced.
NOTE:
TECHNICAL INFORMATION
Zero voltage (high-voltage system switched-off) is only displayed with in PAD mode.
Zero voltage (high-voltage system switched-off) is only displayed with in PAD mode.
Preliminary work
- Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
WARNING:
Working on 12 V electrical system. Risk of short circuits! Risk of fire!
- Make sure that there is no charger connected to the jump start terminal in the engine compartment.
- Detach battery ground lead from battery.
- For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
- Open the positive battery terminal (1).
- Release the diagonally screwed nut (1).NOTE: RISK OF DAMAGE
Damage to battery terminal, the safety
battery terminal or the intelligent battery sensor (IBS) .
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults .- Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.
- Pull off the positive battery terminal (2) from the 12 V battery.WARNING: Unprotected battery terminals. Risk of short circuits! Risk of fire!
- Cover the vehicle battery.
- Secure the positive battery clamp (2) on the side.
- Release the screws (1) and remove the battery carrier (2).
- Detach vent hose (1).
- Remove auxiliary battery (2).