Removal and Installation of Rear Cover
Tightening torquesUniversal shaft clamping nut - 30 Nm
Slot nut or double hex. collar nut for three-legged flange or ring gear - 120 Nm
Combination screws rear cover - 13 Nm, 28 Nm(1)
Drain plug oil pan - 14 Nm
(1) Combination screws with material 10.9
Special Tools:
NOTE: On vehicles with 4MATIC an adapter housing and ring gear are mounted instead of rear transmission cover and three-legged flange. Upon removal of transfer case, proceed according to item 10.
Removal
1 Jack up vehicle at the rear.
2 Unscrew drain plug (1) and drain oil.
3 Screw-in drain plug (1) and tighten to 14 Nm.
4 Loosen exhaust system at plug connection (arrows) and remove together with shielding plate.
5 Remove cross beam (22) together with rear engine mount.
6 Loosen holding strap(21).
7 Unscrew exhaust support (34).
8 Unscrew cable (20) from kickdown solenoid valve (61). Remove screw on impulse transmitter (24) and pull out impulse transmitter.
NOTE: Disconnect shaft on vehicles with mechanical tachometer.
9 Unscrew companion plate (25) on universal flange, loosen universal shaft clamping nut and contract universal shaft as much as possible.
Torque wrench 001 589 66 21 00
Open end wrench 126 589 00 01 00
10 Engage parking lock.
11 Unscrew slot nut or double hex. collar nut (62) and pull off three-legged flange (64) or ring gear (with 4MATIC).
Pin spanner 115 589 01 07 00
Socket wrench insert 126 589 02 09 00
12 Remove washer (65).
13 Unscrew combination screws (71) and pull off rear cover (70) or adapter housing.
Attention!
When removing rear transmission cover make sure that the kickdown solenoid valve is not damaged. If necessary, loosen kickdown solenoid valve and turn slightly.
Installation
14 Mount rear cover (70) or adapter housing with new gasket.
15 Screw in combination screws (71) and tighten to 13 or 28 Nm.
NOTE: Make screws free of grease and coat with non hardening sealing compound.
16 Insert washer (65).
17 Plug on three legged flange (64) or ring gear. Screw on slot nut or double hex. collar nut (62) and tighten to 120 Nm.
18 Secure slot nut or double hex. collar nut (62) by knocking collar into recess on drive shaft (arrow) by means of a suitable punch.
19 Insert impulse transmitter (24), screw-in screw and tighten to 4 Nm or connect tachometer shaft respectively.
20 Screw companion plate (25) to universal flange.
21 Screw cable (20) to kickdown solenoid valve (61).
22 Tighten propeller shaft clamping nut (7) to 30 Nm. Install shielding plate.
23 Install cross beam (22) together with rear engine mount.
24 Screw-on exhaust support (34).
25 Attach cable for kickdown solenoid valve by means of holding strap (21).
26 Install exhaust system.
27 Lower vehicle.
28 Add transmission fluid.
29 Check oil level and correct.