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DESPERATE! Car won't start

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Old 08-28-2016, 05:17 PM   #1
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DESPERATE! Car won't start

Good afternoon, My name is Ferdie. I recently bought a Mercedes CLS500 2007. The driving is great, but sometimes (frequently) my car won't start. The ignition comes on, lights and dashboard light and all other electrics work, but the starter doesn't engage. After waiting for anything between 10 minutes and 2 hours it all of a sudden starts again. I have replaced the remote's battery, and the sensors of the timing and the brake pedal. Nothing seems to work. Can anyone assist? Thank you!
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Old 11-01-2016, 01:03 AM   #2
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bad starter?
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Old 11-02-2016, 04:03 PM   #3
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Diagnostic scan test to pull the codes first
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Old 12-11-2016, 10:25 AM   #4
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Try replacing the crankshaft position senor. It's behind the engine on the driver-side (mounted to the transmission flange, I think), below the coolant temperature sensor. It's a PITA to get to and you may have to remove the MAF sensor and air filter housing to give yourself enough room to maneuver.
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Old 12-13-2016, 03:13 PM   #5
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Quote:
Originally Posted by Launchstation View Post
Try replacing the crankshaft position senor. It's behind the engine on the driver-side (mounted to the transmission flange, I think), below the coolant temperature sensor. It's a PITA to get to and you may have to remove the MAF sensor and air filter housing to give yourself enough room to maneuver.
+1
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Old 12-14-2016, 01:01 AM   #6
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Why are you guys telling the OP to replace the crank sensor when he clearly stated that is does not crank? This vehicle needs to be scanned first.
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Old 12-14-2016, 01:51 AM   #7
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Starters are a fairly common failure on those cars, have it tested (run power directly to the starter and see if it engages) and replace if necessary.
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Old 12-15-2016, 07:29 PM   #8
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Originally Posted by localmechanic View Post
Why are you guys telling the OP to replace the crank sensor when he clearly stated that is does not crank? This vehicle needs to be scanned first.
I see now where he stated the starter won't engage. I still wonder if its just difference of perspective. Helping someone troubleshot over the internet; you have to do what you can to help.
-John
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Old 12-16-2016, 07:24 AM   #9
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I had same before and it turned out to be battery. Check the voltage on hidden menu just incase. If you do change battery only do at Mercedes. I made mistake of going to another garage and they shorted my ecu.
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