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Discussion Starter #1
2004 SLK230

Car wouldn’t turnover one night, when my wife went out to start it after having dinner with the girls. All the lights would come on, but no crank. Tried to jump it with a portable jump box. No luck. Tried both keys. Went back later than night, with another jump box, and it fired right up. Figured it was the battery. Measuring voltage showed 13 volts while running, so knew it wasn’t alternator.

Car started next morning, and a few times after that. Figured all was good. Then same thing happened. No crank. So we replaced the battery (it had an OLD battery anyway) No dice. Still won’t turn over and have START ERROR displayed on dash.

Question- What are the causes for the START ERROR to be displayed on the dash? Can that ONLY be caused by the DAS?
 

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190E, SLK350
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67,009 Posts
Connect a scanner and report back the error codes.
Inspect the crank position sensor and make sure that it's in place and not loose. After that, start working from the intake down.
 

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Discussion Starter #5
All good advice, IF it would turn over and not fire up. However, the issue is NO CRANK. It doesn’t turn over. (Not the starter...tested as good)

The read out of START ERROR is key here.

Trying to find out what causes START ERROR to be displayed.
 

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190E, SLK350
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Aha, then work back from starter to its controller up to protective circuitry (fuses) and relays.
 
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