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Mercedes-Benz A220 2020 Technical Service Bulletin # LI28-10_P-0519352 Date: 120522


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



Mercedes-Benz A220 2020 Page 46



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



Mercedes-Benz A220 2020 Page 47



WIS-References



Attachments



Sample picture showing sweating



Mercedes-Benz A220 2020 Page 48



Sample picture showing leakage

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