Saturday, May 11, 2019

Mercedes-Benz A220 2020 Technical Service Bulletin # LI54-21_P-049150 Date: 100312


Body - Seat Heater Inop. Or Heat Output Too Low



Seat heater is inoperative or heat output is too low



Topic number LI54.21-P-049150



Version 1



Design group 54.21 Control modules/modules



Date 03-12-2010



Validity Model series 207/212: SOP up to 28.02.2010; model series



204: 01.06.2009 - 28.02.2010



Reason for change



Reason for block



Complaint:



The LEDs in the relevant button can be activated but the seat heater remains inoperative.



The complaint occurs primarily at low temperatures and while driving with few or no consumers activated.



Cause:



The seat heater is shut down due to an overvoltage detected at the rear SAM.



Remedy:



Using SDS version 01/10 or later, flash with current rear SAM software and perform SCN coding.



Symptoms



Work units



Mercedes-Benz A220 2020 Page 409



Mercedes-Benz A220 2020 Page 410

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