Hi guys. I have a problem with the wifes W202 C200 auto, and it's driving me nuts.
Generally it drives fine (barring a slight off idle shunt, but can live with that), but sometimes (about 50% lately), after driving mostly stop start slow stuff for a good hour or so (seems only when at full operating temp, 2/3 up the temp gauge, maybe more) it will just cut out and refuse to restart.
If you try to restart it, it does various things....
Sometimes it will jump up to ~1000rpm and immediately cut out again, sometimes it wont even do that, just turns over on the starter.
Sometimes if you keep your foot to the floor as you turn it over it will rev up to the limiter, but if you lift off for a moment and then put your foot back down the revs drop like the ignition is off and it immediately stalls.
It's impossible to hold the revs steady when its like this too, it just cuts out unless you have your foot nailed as you turn it over, and keep it nailed.
Then, sometimes after a few mins, sometimes after leaving it for 30+, it will restart and drive like nothing has happened. This is far from ideal as it's my wifes car and it's stranding her all over the place, sometimes in the middle fo the road.
I've spoke to my local MB specialist and they've never came accross this one, but have STAR they can check it on, but can't be sure it will flag up anything of course. No warning lights appear on the dash btw.
I've had a poke around myself, and the only odd thing I've noticed so far is the car seems to start and rev normally wether I have the cam sensor (the one on the side of the block at the front passenger side) plugged in or not. I'm no MB expert, but on other cars they either wont start or run badly without that plugged in?
ALSO, it has an occasional problem (maybe related)? That when driving (mostly slowly, it's a fantastic motorway and long distance car!) it will lose most of it's power, drive like a slug, feels like it has about 10bhp, no shuddering, just slow. Then you key off and on (even while still moving) and it's perfect again. This one isnt a big deal compared to the other issue though.
Anyone came accross the cutting out problem before? I've seen people say crank sensor gives similar issues, but not sure if it's the exact one, but that looks a PITA to get to, and it's a good 40-50quid to buy too for a pure guess.
I'd rather diagnose properly than throw parts at it until it works correctly!
Thanks in advance
Generally it drives fine (barring a slight off idle shunt, but can live with that), but sometimes (about 50% lately), after driving mostly stop start slow stuff for a good hour or so (seems only when at full operating temp, 2/3 up the temp gauge, maybe more) it will just cut out and refuse to restart.
If you try to restart it, it does various things....
Sometimes it will jump up to ~1000rpm and immediately cut out again, sometimes it wont even do that, just turns over on the starter.
Sometimes if you keep your foot to the floor as you turn it over it will rev up to the limiter, but if you lift off for a moment and then put your foot back down the revs drop like the ignition is off and it immediately stalls.
It's impossible to hold the revs steady when its like this too, it just cuts out unless you have your foot nailed as you turn it over, and keep it nailed.
Then, sometimes after a few mins, sometimes after leaving it for 30+, it will restart and drive like nothing has happened. This is far from ideal as it's my wifes car and it's stranding her all over the place, sometimes in the middle fo the road.
I've spoke to my local MB specialist and they've never came accross this one, but have STAR they can check it on, but can't be sure it will flag up anything of course. No warning lights appear on the dash btw.
I've had a poke around myself, and the only odd thing I've noticed so far is the car seems to start and rev normally wether I have the cam sensor (the one on the side of the block at the front passenger side) plugged in or not. I'm no MB expert, but on other cars they either wont start or run badly without that plugged in?
ALSO, it has an occasional problem (maybe related)? That when driving (mostly slowly, it's a fantastic motorway and long distance car!) it will lose most of it's power, drive like a slug, feels like it has about 10bhp, no shuddering, just slow. Then you key off and on (even while still moving) and it's perfect again. This one isnt a big deal compared to the other issue though.
Anyone came accross the cutting out problem before? I've seen people say crank sensor gives similar issues, but not sure if it's the exact one, but that looks a PITA to get to, and it's a good 40-50quid to buy too for a pure guess.
I'd rather diagnose properly than throw parts at it until it works correctly!
Thanks in advance
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