Transmission Cooler: Service and Repair

NOTE:
The transmission air-oil cooler with blower is only required in vehicles with air conditioner or automatic climate control and trailer coupling if the trailer load amounts to over 1500 kg gross vehicle weight.

Removing and Installing

1. Remove front bottom section of noise encapsulation.
2. Seal off oil hoses (32, 33) on oil lines (19, 20). Remove clamp (22).





Illustration Key
19 Oil line
20 Oil line
22 Clamp
30 Nut M6
31 Bolt M6 x 16
32 Oil hose
33 Oil hose
34 Rubber grommet

Installation Note
Check and correct transmission oil level of automatic transmission. Fit rubber grommet (34).





Illustration Key
25 Bolt M6 x 12
26 Covering
27 Plastic nut
28 Metal nut
29 Bolt B6.3 x 16

3. Unscrew bolts (25, 29) and nuts (27, 28), remove covering (26).





4. Unscrew nuts (23).





Illustration Key
24 Bolt M6 x 16

5. Unscrew bolts (24), then drain air-oil cooler with blower and blower housing a little and disconnect 3-pin plug connection.
6. Remove complete air-oil cooler.
7. Unscrew blower housing (12) with blower (13).





Illustration Key
12 Blower housing
13 Blower
14 Metal nut
15 Bolt B4.8 x 16
16 Plug
17 Connector
18 Clamp
19 Oil line
20 Oil line
21 Bolt M6 x 16
22 Clamp

8. Check air-oil cooler (8) for damage and leaks. Check temperature switch (10).





Illustration Key
6 Retaining bracket
7 Rubber grommet
8 Oil cooler
9 Clip
10 Temperature switch
11 Sealing ring





NOTE:
The temperature switch may also be checked and replaced with the oil cooler in situ. To do this, the headlamp must be removed.