Fluid Line/Hose: Description and Operation

ATF Cooler and ATF Pipes Overview

• Clean working conditions for the automatic transmission. Refer to => [ Clean Working Conditions ] Clean Working Conditions.

• General repair instructions, refer to => [ Repair Information ] Repair Information.

• Seal any open lines and connections with a clean plug from the engine plug set (VAS 6122).

• Check ATF level after replacing ATF pipes. Refer to => [ ATF, Checking Level and Correcting ] ATF, Checking Level and Correcting


There is a risk of damaging the transmission.

• Remove all the plugs on the ATF pipes and on the transmission that were installed during removal.

• The ATF cooling function will not work and the transmission will be damaged if the plugs are forgotten.






1 ATF Cooler

• Integrated in the coolant cooler

2 Bolt

• 9 Nm

• For attaching the ATF pipe to the engine

3 ATF Pipe, Return

• From the ATF cooler to the transmission

• Before removal, mark the ATF pipes in relation to each other so they are not switched.

4 O-ring

• Replace

• Coat with ATF before inserting

5 O-ring

• Replace

• Coat with ATF before inserting

6 Bolt

• 5 Nm

• First insert the ATF pipes with new O-rings by hand as far as the stop

7 ATF Pipe, Supply

• From the transmission to the ATF cooler

• Before removal, mark the ATF pipes in relation to each other so they are not switched.

8 Bolt

• 5 Nm

• First insert the ATF pipes with new O-rings by hand as far as the stop

9 Nut on the ATF Pipe

• 29 Nm

• The ATF pipes are secured to each other

10 ATF Pipe, Supply

• From the transmission to the ATF cooler

• Before removal, mark the ATF pipes in relation to each other so they are not switched.

11 O-ring

• Replace

• Coat with ATF before inserting

12 O-ring

• Replace

• Coat with ATF before inserting

13 Bolt

• 20 Nm

• First insert the ATF pipes with new O-rings by hand as far as the stop

• The retaining tab on the lower ATF pipe must lie on the transmission threads

• The retaining tab on the upper ATF pipe must lie on the lower one.

14 Bolt

• 9 Nm

• For attaching the ATF pipe to the engine

15 ATF Pipe, Return

• From the ATF cooler to the transmission

• Before removal, mark the ATF pipes in relation to each other so they are not switched.