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

This thing won't turn on. Please help :(

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Old 01-25-2016, 04:50 PM
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R500
This thing won't turn on. Please help :(

Hey guys, I have been having a weird issue with my wife's R500. This happens most the time. The car cranks but doesn't turn over, it almost sounds like a dead battery but the battery is %100, sometimes it catches and will turn on but most the time it cuts off and won't turn on, when the car is completely cold, it always starts just fine, if I leave the fob on cranking position for 15 seconds or so, it turns on but ESP malfunction comes on. Then I have to turn it off and on right away. I finally got it to throw check engine light and it read P0355 which is the Crankshaft sensor circuit A, I have replaced it just now(big pita-no space but done) Cranked the car and it started right away, sigh! But after I drove back home and turned it off, it wouldn't turn back on just like before and the check engine light also came back on for the same code. I have been trying to figure this problem out for a year now and so far, I have replaced the whole fuse box, and put in a new battery. I'm out of options. Anybody have an idea? Thanks in advance!!
Old 01-25-2016, 09:04 PM
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2008 R320 CDI, 1987 560SL
It sounds like a typically CPS problem. I'm wondering if you got a defective sensor or the lead is damaged.
Old 02-21-2016, 12:12 AM
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I have replaced the CPS again but no luck...
Old 02-21-2016, 08:23 AM
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2008 R320 CDI, 1987 560SL
Have you checked your battery compartment for water?

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