Drivetrain - Oil Leak At Seam Between A/T And Transfer Case

Mercedes Benz C 250 4MATIC (204.085) (CAN) V6-2.5L (272.911) Technical Service Bulletin # LI28-10_P-0519352 Date: 120522

Drivetrain - Oil Leak At Seam Between A/T And Transfer Case

2010 Mercedes Benz C 250 4MATIC (204.085) (CAN) V6-2.5L (272.911) Page 12

Oil leakage at transfer case of automatic transmission 722.96x

Topic number LI28.10-P-051935

Version 2

Design group 28.10 Complete transfer case

Date 05-22-2012

Validity Veh. with transmission model 722.96x up to transmission sequence no.: 2.741.558

Reason for change Revision of damage code & OK transmission sequence

number added.

Complaint:

Oil leakage at the seam between the automatic transmission and the transfer case.

Leakage can occur around the entire seam.

Attachments

Cause:

Leakage at automatic transmission/transfer case flange.

Remedy:

Sealing with black sealant (Loctite 5970) only if there is definite droplet formation in the vicinity of the seam or in the vicinity of the propeller shaft

to the front axle transmission.

If the problem is a "sweating" leak, sealing must not be carried out, as this is a normal phenomenon inherent in the design of oil-filled systems.

In accordance with the WIS instructions in the attachment, disassemble the transfer case housing and seal it using black sealant A003 989 98 20

(Loctite 5970).

Symptoms

Parts

Work units

2010 Mercedes Benz C 250 4MATIC (204.085) (CAN) V6-2.5L (272.911) Page 13

WIS-References

Attachments

Sample picture showing sweating

2010 Mercedes Benz C 250 4MATIC (204.085) (CAN) V6-2.5L (272.911) Page 14

Sample picture showing leakage