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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3567
Experience:  Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
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My 2007 SL550 engine will not even turn over. I have tried

Customer Question

My 2007 SL550 engine will not even turn over. I have tried both keys and i have jump started it. The start battery shows 14.5 v and registers Full with my battery checker.
JA: Does the engine spark at all? Is there a trouble code or is your "check engine light" on?
Customer: I read the post from a customer who had the same problem with a 2009 SL550. Do you have any other suggestions.
JA: Are you fixing your SL550 yourself? What have you tried so far?
Customer: I have tried jumping, charging the battery, tried both keys, replaced batteries in keys
JA: Anything else you want the mechanic to know before I connect you?
Customer: I had checked a fuse #28 removing and repalcing it just before I tried to start it. The horn had stopped working and i thought it might be the fuse
Submitted: 11 months ago.
Category: Mercedes
Expert:  Lou P. master tech replied 11 months ago.

Hello, my name is***** and i will do my best to assist you.I am going over your story now and will reply back soon with some info,thanks!

Expert:  Lou P. master tech replied 11 months ago.

what is the voltage at the front battery AND the rear battery?

what happens and what turns on when the key is turned on?

Expert:  Lou P. master tech replied 11 months ago.

are you still needing help? i have not heard back from you?