ATF In Rear Final Drive 0BF and 0BE, Filling

ATF in Rear Final Drive 0BF and 0BE, Filling

Special tools, testers and auxiliary items required

• Vehicle Diagnostic Tester

• Charging Device F/Haldex 2 Coup. (VAS 6291) or Charging Device for Haldex Coupling 2 (VAS 6291A)

• Adapter for Oil Filling VAS 6291/2 (VAS 6291/2) or Adapter for Oil Filling VAS 6291/3 (VAS 6291/3)

• Catch tray

Test Conditions

• The rear final drive must be in its installed position.

• The vehicle must be horizontal.

• Install and tighten the ATF drain plug. Tightening specification => [ (Item 15) ATF Drain Plug ] Rear Final Drive Overview.

Danger of causing damage to the rear final drive.

• Only the ATF available as a replacement part may be used. Refer to the Parts Catalog.

• Using other fluids will cause malfunctions in the rear final drive or will cause the rear final drive to stop working.

• For the correct allocation, refer to the Parts Catalog.

• The ATF filling tool must be clean. Do not mix ATF with other fluids.

- Fill using the (VAS 6291).

- Raise the vehicle.

- Remove the ATF inspection plug - 1 -.






The ATF check plug - 1 - is located on the left side of the rear final drive. ATF on the final drive housing - arrow -.

- Disconnect the adapter - A - from the elbow - B -.






- Install the adapter - A - all the way in.

- Lock the elbow - B - to the adapter - A -.

- Route the hose over the left drive axle.

• The hose must not hang down. It must come out above the left rear wheel.

- Lower the vehicle.

- Make sure the valve - arrow - is closed.






- Attach the oil container - A - to the (VAS 6291).

- Open the valve - arrow - and hold the oil container as illustrated.

The hydraulic control unit and the left and right chambers in the rear final drive are now filled.

• The rear final drive hydraulic control unit is filled correctly when the ATF starts to leak out of the adapter - A -.






If ATF still does not leak from adapter - A -:

- Continue filling until the level is correct.

If ATF does leak out of the adapter - A -:

- Raise the vehicle.

- Put down the oil container, for example, on a tool cart.

Some of the excess oil will not run back into the oil container.

- Disconnect the (VAS 6291) when the ATF stops flowing back.

• The fluid level is correct when the rear final drive is filled up the lower edge of the fluid fill hole.

- Install the ATF check plug - arrow - hand-tight.






- Connect the vehicle diagnostic tester and turn on the ignition.

- Select 22 - Fill ATF in the vehicle diagnostic tester under Guided Functions in directory 22 - AWD electronics

• Follow all the instructions on the vehicle diagnostic tester exactly.

The vehicle diagnostic tester fills and bleeds the system.

• If, after performing the 22 - Fill ATF, the system detects air still in the system, then the filling procedure must be repeated.

- Remove the ATF check plug - arrow - again.

Test Condition

• The ATF level is correct when the rear final drive is filled up to the lower edge of the fluid fill hole - arrow -.

• Fill with ATF if necessary.

• There are no entries and no "sporadic" in the Diagnostic Trouble Code (DTC) memory see vehicle diagnostic tester.

- Install and tighten the new ATF inspection plug - arrow -. Tightening Specifications => [ (Item 12) ATF Check Plug ] Rear Final Drive Overview.