R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

No crank but everything else is working.

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Old Oct 25, 2023 | 12:17 PM
  #1  
PD216's Avatar
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R350
No crank but everything else is working.

Weird situation with my 2009 R350. When I insert the key, i get a "remove key" message on the dash. However, reading the data stream on the EIS, everything is working as should (circuits 15 and 50). When I turn the key fully, the starter relay clicks and makes contact. Full continuity on wires from relay to starter. Yet no crank.

Is there a more definitive way to be sure the starter is bad? it's a bear to remove it only to find that it is good.

Incidentally, right when this problem first happened I got a code for the alternator interface. Pulled alternator and it tested bad so i did replace that. Easy on that one, at least. Wondering if the starter did go bad and caused the alternator regulator to go bad.

Honestly this does seem like a bad starter.... but I am thrown by the "remove key" message that immediately pops up.

Also. there are no good videos on getting this starter out, but just a glance at it tells me it will be a major undertaking.

If you are wondering, this vehicle does not have an ESL (electronic steering lock), which was my first guess when this happened but turned out there isn't one... besides, I am getting power to the relay when I turn the key, so I suppose that rules out EIS and ESL.

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Old Nov 29, 2023 | 06:28 PM
  #2  
vchris11's Avatar
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2007 R350
Similar problem

Hello I have a 2007 r350 with almost the same problem that I thought it was the starter everything works and whatnot and just it won't wouldn't crank and it turned out to be the crank shaft positioning sensor on your bell housing of the transmission and the engine
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Old Nov 29, 2023 | 06:29 PM
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vchris11's Avatar
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Joined: Aug 2022
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2007 R350
Similar problem

Hello I have a 2007 r350 with almost the same problem that I thought it was the starter everything works and whatnot and just it won't wouldn't crank and it turned out to be the crank shaft positioning sensor on your bell housing of the transmission and the engine
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