my s550 will not start,changed battery,instrument panel and radio comes on ,engine will not turn over

Asked by Jan 15, 2017 at 12:36 PM about the 2010 Mercedes-Benz S-Class S 550

Question type: Maintenance & Repair

replaced battery in my 2010 s550 ,instrument panel lights and radio works, car still will not start ,engine will not turn over

3 Answers

29,075

if cables/grounds and battery is charged/ok.....then next step is to replace the starter

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10

My S550 has two batteries - starter batter under hood and accessories battery in the trunk.

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15

In 2009 MB S550 eliminated trunk battery. Following years there is one large 12v starter battery under hood against passenger firewall. There is another small auxiliary 12v battery under driver side dash which assists in electronic gear shifting and transmission operation. MB sophisticated electronics require healthy batteries, alternator, sensors, fuses and SAM (single acquisition module). They all must be working properly and SAM must be programmed to vehicle. This will allow functionality buttons to work prevent premature battery draw. You would think MB would have these related problems solved. They do not.

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