I just had my CPS replaced by our mechanic and the car no longer struggles at idle in drive or reverse! Hopefully this will help it from stalling when it's cold out...
2005 thread but good one. Thanks for the pics. I think I have to replace my CPS since sometimes, engine turns but does not start. However, it almost always starts the second time I try.
However, no one ever gets into the specifics of the torque screw. I think i found what could be the cps at the back of the engine on my 99 clk 320. it's got a cable going to it, but i don't see the screw/bolt. is it correct that it's facing downwards and that you can only get to it with your hands but can't physically see it?
also, many of the posts indicate that a 1/4" drive E8 socket is needed. i wondered how earthwonder was able to remove a this bolt with an allen wrench, unless there is a small slot for such an insertion. if so, does anyone know the size of the allen wrench needed?
lastly, when you actually do a search for this part at thebenzbin, fastlane, etc, you'll find two (e.g. http://mercedes.thebenzbin.com/?year...ield22222.y=12) one with a double interlock at the flywheel for over $100 bucks, and one with a single interlock for approx $75 bucks. which is the correct part as they're both listed for a 99 clk 320. Many have mentioned that your local Autozone would have this part as well, they only have one listed (http://autozone.com/servlet/UiBroker...%7ENONE%7C%7EV) and it's only $55 bucks for the part (albeit a non oem brand). Not sure which to go with.
thanks so much. this should answer a lot of the same questions i would think many others would have. e.g. aside from where it is, the direction its facing and what type it is (e.g. need socket or allen wrench), and the exact part (considering that there are typically 3 options).
cheers all. i hate that i know this is a sub $100 part (potentially $55 if you guys think the autozone part is ok), and that it takes only 15 minutes to replace, but even the local auto shop wants to charge me $220 to make the replacement. ridiculous!!! that god for all you diy'ers!!!
Cool, complained about the CPS problem to NYHSA and someone actually got back to me,... do I hear service campaign alla harmonic balancer... if enough of us complain as well?
"Dear Sir/Madam,
Thank you for reporting to the National Highway Traffic Safety Administration (NHTSA) concerning engine stalling (due to crankshaft position sensor (CPS) failure) in your Mercedes vehicle.
:P
The Office of Defects Investigation (ODI) of NHTSA has received a number of complaints on the subject issue. To assist us further in evaluating the issue, please scan and email the repair invoice for the CPS replacement. Also, if you have the old CPS and no longer need it, please let me know and I can email you the shipping information so you can send the CPS to us free-of-charge.
Was there any warning prior to the CPS failure?
How difficult was it for you to control the vehicle after the engine stalled?
Were you able to re-start the engine right-the-way? If not, how long did you have to wait before the engine was able to be restarted? If the engine restarted, did it stalled out again?
Please email the links of any internet forums you know of where the subject matter was discussed.
i just removed the engine cover and the wire that connects to the CPS. however i could not remove the CPS itself because i do not have exernal torx sockets. but i dont think i'd be able to do anything even if I had these sockets because there is NO ROOM.
i cannot understand how the original poster was able to loosen the torx bolt with an allen key??? i'm not seeing the conneciton here, hex key with a torx ???
As I said in the original post, it is almost impossible for a ratchet set even with the correct torx sockets to fit down there. The allen wrench tool is basically the same shape as a torx socket, but much skinnier and smaller so that's why it worked flawlessly. I know it looks impossible, but when you actually get the tool within range of the nut, it's very doable. Just a quick counterclockwise twist to loosen it up and you're on your way to no more c-c-c-crank. You can pick up a small packet of allen wrenches for about $5-10 at any Walmart or auto shop.
Thanks for all the props, it's very much appreciated.
Last edited by earthwonder : 11-30-2006 at 04:37 PM.
Please help, i don't want to go to a dealer/autoshop for a 15 min diy job! 
to make the replacement. ridiculous!!! that god for all you diy'ers!!!
thanks ,i will try that
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