Problem Description and Possible Solution
The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance.
Problem DataRepairPal Verified
Average mileage: 108,820 (72,000–180,000)
16 people reported this problem
Turned over for 3-5 minutes before starting. Trick was to turn it over for a couple minutes, let it sit for 10 mins and try again once it cooled off from the first try. Usually started on the 2nd or 3rd try. Brought it to the mechanic and the Crankshaft Position Sensor Failure code popped up on his machine. Changed the part and problem solved.
Started fine when cold, but after 5 miles, when stopping at a traffic light, engine dies and will not restart.
Very embarrassing in stop and go traffic......car will start when cooled off, but replace that crank sensor ASAP.
Independent German car repair facility charged $350 to replace a $40 part in half an hour.
Will fix it myself from now on......
This is a very common problem on the Mercedes.
The Crank sensors fail at around 100K miles.
The sensor itself costs around $40- to 120, but it is located in a very tight spot to get to...
LH side of the engine, down near where the transmission bolts up to it, and close to the exhaust system.
Many automotive shops charge outrageous prices to replace the crank sensor....