Mercedes Benz

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) Technical Service Bulletin # 521210 Date: 101201 Interior - Front Seat Heater Activates On It's Own 2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 245 SI B52 12 10 Seats December 2010 Technical Service SUBJECT Seat Heating Activates On Its Own MODEL E82, E88 (1 Series) E90, E91, E92, E93 (3 Series) Only vehicles equipped with SA 494 (Front Seat Heating) and SA 534 (Integrated Automatic Air Conditioning) Only vehicles produced from 8/31/2009 to 2/25/2010 SITUATION The front seat heating sporadically activates on its own. CAUSE Defective plug-in contacts in the wiring between the SZM (Center Console Switch Cluster) and the IHKA (Integrated Automatic Air Conditioning) control panel PROCEDURE Perform diagnostics using ISTA (Integrated Service Technical Application) for any fault codes that may pertain to the seat heating function. Follow the procedure as outlined below if standard diagnosis does not identify the problem. 1...