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Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
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I have an SL350 Night Edition 2010 230 model, and I have had

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I have an SL350 Night Edition 2010 230 model, and I have had intermittent problems with the wipers/screen wash not working, Comand system fading, SRS warning on, seat belts jerking, etc particularly on start-up. I have put it down to a faulty ignition switch intermediate setting, which seems to send a false message to the ECU. I have checked all fuse boxes, connections and wiring : the car is as-new in every other respect! From research, I think this is a common problem, so I would love to hear your comments. JB
please try to use a spare key first of all.
If the problem re-occurs with two different keys- it is possible that either electronic ignition switch or other control units cause a shutdown of interior CAN network.
Also, please have the batteries tested- if the voltage drops too low during cranking in main battery- this can cause the CAN communication to break down.
Best regards,
Stan and other Mercedes Specialists are ready to help you
Customer: replied 2 years ago.
OK, thanks, ***** ***** try other key and also have the batteries (2) checked
Customer: replied 2 years ago.
Stan I have changed the supply battery so will wait to see if problem recurs. Thanks!
Will be glad to assist you further if needed.