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Old 03-08-2014, 12:26 AM
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Diesel911 Diesel911 is online now
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Location: Long Beach,CA
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Disconnect a Negative Cable at the Battery.
See the pic.
Remove the Cable from #2

Keep the Cable end you removed away from any Ground and reconnect the Cable at the Battery.

Touch the Cable from #2 to the Starter at #3 and see if the Starter rotates. If not check the Battery to Chassis Ground and the Engine to Chassis ground and try again.
If nothing happens or it sparks alot you have some issue inside of the Starter.

If it rotates OK try having someone turn the Ignition Key on and they you touch the Cable to #3. If it cranks normally like that the contacts inside of the Solenoid are burned.

Not it is a good idea to wear some Leather Gloves and Eye protection.
Attached Thumbnails
Starter Circuit hard to troubleshoot-generic-mercedes-starter-mar-14.jpg  
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