Saturday, May 25, 2019

Mercedes-Benz A220 2020 Technical Service Bulletin # LI13-20_P-049041 Date: 100310


Engine - Squeaking Noises From The Belt Drive



Squeaking noises from the belt drive



Topic number LI13.20-P-049041



Version 1



Design group 13.20 Belt drive, general



Date 03-10-2010



Validity Belt drive, engine 272 and engine 273.



Reason for change



Reason for block



Complaint:



Squeaking noises from the belt drive



Mercedes-Benz A220 2020 Page 405



Cause:



Axial shifting (temperature-related) of the individual belt pulleys and guide pulleys can lead to squeaking noises in isolated cases.



Remedy:



Application of Krytox lubricant - belt dressing A000 989 36 60 (from lubricating kit A000 580 03 50) - one to two drops at each point to the inner



and outer side edges of the poly-V belt. Procedure:



- Bring the engine to the operating temperature (80 deg. C) and switch it off.



- Remove top front engine cover as required to get access to the poly-V-belt.



- Apply one to two drops of Krytox lubricant to the inner and outer side edges of the poly-V belt near the top idler pulley (important: only treat the



edges of the belt. If the lubricant is applied to the running surface of the belt, this can cause the poly-V belt to slip).



- Start the engine so that the lubricant can spread along the edges of the belt.



* Sufficient for 15 cars, Submit as Local Purchase - KRY00284, Qty 1, handling is included



Attachments



Symptoms



Parts



Work units



Mercedes-Benz A220 2020 Page 406



Validity



Mercedes-Benz A220 2020 Page 407



Attachment - Description: Apply Krytox to edges of poly-V belt

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