270655 Replacing battery

WM 270655 Replacing battery

Tools





Technical values





Preliminary work

Preliminary work for battery

Information

The AGM (Absorbent Glass Mat) battery is a maintenance-free, sealed battery.

- This battery must not be opened. If the battery is opened, it must be replaced.

- There is a serial number and a part number on the top of the battery at the right-hand side.





Serial number and part number on battery

- If the battery is replaced, both numbers must be entered in the gateway control unit under: Gateway/Maintenance, repairs/Change battery.

- The battery size and battery manufacturer must also be entered when changing the battery.

1. Open the luggage compartment floor.
2. Remove tool kit tray.
3. Remove control unit for voltage transformer for Start/Stop, if used. -> 270419 Removing and installing voltage transformer for Start/Stop - section on "Removing" 270419 Removing and installing voltage transformer for Start/Stop

Removing battery

Information

Switch off all loads and remove the ignition key.

- Do not disconnect the battery while the engine is running.

- Disconnect and reconnect battery with extreme caution.

- Do not rub the battery with a dry cloth.

The battery is located in the luggage compartment under the luggage compartment cover/toolbox tray.
1. Pull off vent hose -A- on the battery.





Central venting

2. Risk of short circuit! First disconnect the negative cable -1- , then the positive -2-.





Removing terminal clamps

3. Unscrew the two fastening screws -3- on the retaining bar -4- and the two fastening screws -5- for the rail -6-.





Unscrewing fastening screws on retaining bar

4. Unscrew the two fastening screws -6- and remove the retaining bar.
5. Lift the battery up and out.

Installing battery

1. Insert and position the battery.
2. Position the rail -6- under the battery and fit the retaining bar -4-.





Positioning battery and retaining bar

3. Fit the four fastening screws -3 and 5- and screw them in by hand.
4. Tighten the fastening screws -3-. => Tightening torque: 10 Nm (7.5 ftlb.)
5. Tighten the fastening screws. => Tightening torque: 23 Nm (17 ftlb.)
6. Risk of short circuit! First connect the positive cable -2- , then the negative -1-.





Attaching terminal clamps

7. Tighten the terminal clamps. => Tightening torque: 6 Nm (4.5 ftlb.)

Subsequent work

Subsequent work for battery

1. Install control unit for voltage transformer for Start/Stop, if used. -> 270419 Removing and installing voltage transformer for Start/Stop - section on "Installing" 270419 Removing and installing voltage transformer for Start/Stop

Information

The AGM (Absorbent Glass Mat) battery is a maintenance-free, sealed battery.

- This battery must not be opened. If the battery is opened, it must be replaced.

- There is a serial number and a part number on the top of the battery at the right-hand side.





Serial number and part number on battery

- If the battery is replaced, both numbers must be entered in the gateway control unit under: Gateway/Maintenance, repairs/Change battery.

- The battery size and battery manufacturer must also be entered when changing the battery.

2. If a new battery was installed, the new battery must be documented in the gateway control unit using the PIWIS Tester 9718.
3. Carry out work instruction after disconnecting the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery.
4. Fit tool kit tray.
5. Close the luggage compartment floor.