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CLK 230K power loss...

cvhughesy

New Member
Joined
Aug 10, 2009
Messages
6
Location
Acton, Laaandan Tahn!
Car
CLK 230K Cabriolet
Hi all!

Just a bit of curious info really...

I have had a problem with my engine for as long as I can remember, but knowing no different, I just ran with it, as the fuel economy was ok, and it ran ok.
The problem is like this; When I start her from cold, she runs quick, like she's supposed too, but as soon as I get up to temperature 80'C or so, she loses power, and it feels like I'm driving a normal 2L car - makes a lot of noise, but no "kick in the pants" feeling. I could actually feel the supercharger switch off if I was accelerating during the temperature change!
Well, speaking to a few different people (MB dealer included) It was suggested that it could be one of a number of things, EGR valve, Lambda sensor, MAF, Supercharger valve etc, etc.
I decided that curiosity was getting the better of me, and took it to a local garage. They put their code reader on, and it didn't throw up any codes...so after a quick look around on the tinterweb, I took it to an MB specialist in North Acton (Mi-Tech) and hooked it up to a proper Star machine. They took it through a few tests, and they quickly came to the conclusion that everything pointed to the Cam Sensor. I failed to see how this would be connected to a temperature related fault, but took their advice on good authority. The part from an MB dealer was £101+VAT, and after getting a quote of £65+VAT from Euro Car Parts, I decided to get this one. Yes, I know that this isn't always the best thing to do, and yes, sometimes it's best to go to the MB stealers for oem parts, but once I had the part in my hand, I could see that it was EXACTLY the same as the faulty one (even had the Merc logo on it!)
It's such a simple thing to change (2 bolts) that I had it done in 10 mins. Then as I took her for a test drive - getting up to temperature - all was as it always had been, sweet and powerful. Then as it reached the point where I expect the loss to occur, nothing changed. I still had all the power I needed on tap! In fact, the one thing that did change is the lovely mechanical chirping from the sweet sounding supercharger online!

It's like having a new car, all those lovely horses at my beck and call!

Hope this was helpful to anyone with similar symptoms...
 
Could you tell me where is the Cam Sensor located?

Cheers.
 
It is under the first plastic cover as you are looking at the engine from the front. It is under the plastic cover in front of the rocker cover. There is a star usually embossed on the top.
 

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