Join Date: Feb 2013
Location: Tallahassee, Florida
Vehicle: 02 SLK 320 w/ AMG Sport package
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SLK320 Stalling (not K40)
Over the last month I have been trying to trouble shoot randlom stalls in my SLK 320. Its a 2002 and about a month ago she started stalling out of the blue and on random occurances when at idle, i.e. while waiting at a traffic light.
The engine would cut off and for a second all electrical would die. If I put the car in park, took the key out and replaced it, it would start right up. After the first three times I took it to my mechanic and he saw no codes being thrown. He did indicate that he'd seen this and thought it was the Cam positioning switch. We replaced it and thought that did it, but the next week the car started stalling again.
Next I had him order a Mercedes K40 relay and I replaced it this weekend. When I removed the old one, it had a manufacture date of 2011, the new one was 2013. I thought it unlikely that it was bad, but popped in the new one anyway. Over the weekend I test drove the car with no stalls, but this morning on my way to work it stalled in traffic, on the busiest road in town. Again, park, key out and back in and it fired right up.
I am about to just take the car and leave it with my mechanic, but am already out nearly $400 in parts and labor between the Cam positioning switch an K40. Does anyone have any ideas of areas this could be?