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I store the wife's c280 every winter. Today, I left the car cover in the trunk, and used the jumper cables to reconnect the removed battery for access ~ but the wrong way round for about 30 seconds. After connecting correctly, the wipers and windshield washer pump seem to be permanently on. Not sure of any other issues; car started but I disconnected power promptly.
Any thoughts on what I may have fried? And what might it cost me apart from grief from the Mrs.
Thanks
 

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Coupe/Convertible Forums Moderator
CURRENT: 2011 SL550, 2011 C300 FORMER: ML350, CLK550 Cabriolet, C240, ML320, 300TD
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You likely killed the front SAM. You can swap in a used one from a car of the same model, facelift (i.e. pre-2005 or 2005+) and options.
 
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