Help: S550 Frustrating but SERIOUS electrical issues
09-01-2011, 10:11 PM
#26
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S550 QX56 CAT-D8N
09-02-2011, 12:27 AM
#27
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Location: Dallas TX
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Mercedes S550, Mercedes C240
It's at the Dealer now
It's at the Dealership now. Not sure how much the price is on the batteries, or if that's even what they will say is wrong. I'll call them first thing in the morning and run that by the service guy. Maybe that will eliminate a lot of unnecessary diagnostics...
09-03-2011, 02:03 AM
#28
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Mercedes S550, Mercedes C240
Well, I took it to the dealer and they tested both batteries and yep, both were reading low voltage. $647 for replacement plus diagnostic. At least I got to drive a pretty cool loaner car. 2011 E-Class. But I still miss my S550.
09-03-2011, 08:26 AM
#29
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(1960) 300d, S550 AMG S500 S600 560SEL
I remember my service advisor telling me mb needs around 16v not the normal 12v like other cars. Replacing both battery is an option. Another option is disconnect both battery and wait 15 mins then reconnect. The front battery is aux. Rear is the main unit. Hope that helps
