dnguy344

so i don't drive this car often, 2 weeks ago i drove it for 30 mins and it died on me while i was turning at a redlight, would not start again. One hour later it started again and able to drive back home. Last weekend i tried to drive it to Mercedes to get it checked, died on me again within 20 mins of driving, won't start again till an hour later, took me all day to drive it back home because it seems like when something is hot, the car shuts off. And when it shuts off i can't start it again till the engine is cool...any idea? please advise!!
oh and i forgot to mention its almost 2 months overdue for service..hahaha, i don't think that has anything to do with the issue.

Mka77

Could be this;

https://mbworld.org/forums/clk-class...tory-help.html

dnguy344

thanks Mka77, sounds just like the problem i'm having...i guess imma order me a CPS

Rudeney

In the mean time, if it dies and you need to get going, just pour a liter of cool water over the CPS.

dnguy344

haha thanks, i wish i knew this last weekend so i didn't have to waste the whole day waiting for the damn thing to cool down so i can drive it home. Anyways, i just ordered the part hopefully that'll fix the problem..thanks again guys!!!

MANUMB

The dealer wouldn't replace mine under warranty as they couldnt mimic the problem and confirm it was indeed the CPS. I told them it was BS and having my car shut off while I was driving is not my idea of fun... seems like a lawsuit waiting to happen. They still wouldnt budge, so I replaced it on my dime. I have had no problems since! Good luck!

Rudeney

Really? It was under warranty and they refused to replace it? Unbelievable! I know that proving CPS failure can be difficult since it rarely throws a code, but still, it's easy to diagnose - heat = dying or no start, solved by cold water on the CPS - it doesn't take a rocket surgeon...

Glyn M Ruck

+1^

billyhead1

That precisely describes the CPS failure mode. When the dealer replaced mine, the repair order shows that the tech removed the part and tested it by pointing a heat gun at it.

dnguy344

cps came in and i've looked right rear engine and i couldn't find it, not much space back there, any idea, suggestion, or pictures? i've seen pictures of it on the E-class that didn't help, i don't know if its at the same area as my w09 clk500....thanks

Glyn M Ruck

See Wiki: Same position on all V6 & V8 Benz engines.

https://mbworld.org/wiki/images/e/e9...ion_sensor.pdf

Rudeney

Glyn, that looks like an M272 engine. On the M112/M113 engines, it's actually closer to the 12 o'clock position, which ends up being hidden by the MAF sensor and throttle intake elbow. If you remove those parts, it makes the job much easier. Here's the WIS:

M112/M113 CPS R&R

Glyn M Ruck

Nah! It's in exactly the same position below the head. The M272/273 block is merely a stiffened M112/113 block with quadcam heads.

Rudeney

Hmm, I've replaced a few on the M112 and M113's and I swear they were almost directly below the MAF. Maybe 10-degrees offset at the most. I guess it's just an
"illusion" when working on top of the engine while practically standing on ones head to reach the darn thing!