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CLK 200 Kompressor:Strange behaviour of the Compressor side when the engine is

Sancld

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Jul 5, 2012
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Mercedes Clk 200 kompressor
Hello to everybody!

I’m contacting for a question about my MERCEDES CLK 200 Kompressor Serie W 208 (345) July 1999 (with ca. 186000 km.)

Since a couple of months I’ve noted a strange behaviour/ of the Compressor side when the engine of my CLK is warm and reaches the 3500 Rpm

When the engine is cold everything runs ok, as the operating temperature of around 80 Degree Celsius is reached (as on the Dashboard) and I accelerate crossing around 3200 – 3500 Rpm the Compressor side doesn’t want anymore to enter in coupling with the motor.

Simply it stays as switched off, it follows “as a passive element“ and the engine and the motor runs as “chocked”.

The Compressor results as not doing its part.
no feeling of its presence (when the engine is warm)

Basically the Motor runs, but with lost of the original gain that you can feel when the Compressor enters
(Usually as soon are crossed the 2000 Rpm. its switch on and you can feel it), but now no enough desired acceleration.

The first possibility is wait till the engine cools down till, and then when is cold it drives as usual, but as soon as are reached the 80 Degrees then comes the issue.

By opening the cover of the engine and with a overlook /inspection,
(always and after that the engine is warm) in the engine area, I noted that the Electromagnet by accelerating, doesn’t want to come in coupling with the other rotating parts.

It follows (simply) the other rotating parts and not “pushing them” to follow him (if I can express in this way).
Only just few slightly rotating attempts but too slight to demonstrate its real power.
Never had in the past something like this.

But (again) when the engine is cold is ok… (!)

In order to understand and try to solve the issue I’ve tried following steps:

- Complete Reset of the Mercedes. - Result no differences.

- Because in the past my CLK was starting to “sneeze” together with my machine workshop man we discovered that the E-wirings going to the Sparks (the ones located below the red aluminium deck placed on the top of the Cylinders head) were in Short circuit and we had them to exchange.
Result no differences.

- Lambda sensor changed - Result no difference.

- The round Bosch Camshaft adjusting position sensor (the one located and attached at the end of the Camshaft as shown in the photo).Checked if there were oil leaking coming from the camshaft and „running“ in(side) the sensor and then along the wirings. After inspection my workshop man said is ok (no problem).

As general information: currently I’m driving with (inside the exhaust pipe) the catalisathor that has the ceramic detached.
(In fact while driving is possible to hear slight “sound” of small/little “rocks” that are rolling inside the chamber of the Exhaust pipe) These are the fragments of the ceramic.

A interesting thing that happened (in the past week after checking the Mass airflow Meter (MAF).

After having briefly inspected the (MAF) I’ve remounted it inside the car and unintentionally forgot to connect its (control) plug. And then I used as usual the car.

The result was as driving the car without the “presence” of the Kompressor (exact the same sensation as mentioned in the beginning of this e-mail)

(means: in Warm condition the engine results as chocked)

So now comes my question…. can this depend from the MAF ?
(But if it so, why not when then the engine is cold?)

Or can be /depends from something else?

Is there someone that can help me ?
That can give helpful advice before to think to change another time the MAF because the problem is something else and then avoid to give out money for a “wrong way”?

Is there maybe the possibility to check ,make a diagnosis of the MAF ?

Thank you a lot in advance for your kind helpful suggestions and hits

Best regards

Claude S.
 

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Hi Claude, I am unsure how the clutch on the compressor is programmed to engage but it sounds like a default safety mode from the ecu and perhaps the catalyst break up could be responsible. I had this on an Ml that had a blocked cat, as soon as the engine was warm and being fuelled harder it shut it all down to limp. I supercharged a 2 litre type 4 van and melted a piston when the catalyst blocked. ( that didn't have the refinement of any fail safe!). I don't wish to send you on a wild goose chase but as your already aware of there being a problem with the cat then it could be a good place to start. I don't know the arrangement on your car but if there's sufficient airflow around it slackening the flange coupling and re tightening with a small piece of metal like a washer for example will allow it to blow slightly and drop the pressure enough to prove or disprove it as being a cause
 
Re to Tim203:CLK 200 Kompressor Strange behaviour of the Compressor side with engineW

Hi and thnx,

In order to forward a additional feedback

Consider that I have studied mechanics in the high school, that my CLK 200 Kompressor s a car that I love (is the only one that I have and need) so for this reason I keep attention to “her” how “she” is “Talking - feeling”.
And because I worked in the past for ca. 8 years as Project Leader for the Automotive in one of the top Worldwide Companies skilled as supplier for the developments of moulds for German cars, so after having a Alfa Romeo I “went” to a Mercedes CLK.

This should help a bit more to fulfil the question what can be “… about arrangement of my car …”.

Besides this, in the enclosed picture I show the part of he compressor that I mentioned hat when the motor reaches 80 Degree Celsius and arrives around the 3200-3500 rpm the Compressor doesn’t enter in coupling.

The catalyst is not blocked is simply released from its seat and after a lot of km inside the chamber is disintegrated. (for this reason is possible to hear the sound of “rolling rocks”. I hope that is completely disintegrated.

The clutch effect derives because the electromagnet of the compressor doesn’t enter in coupling when the engine is in warm condition giving a lost of performance to the engine.

What can be the cause?

The MAF?
Something wrong / or a damaged Electromagnet? Or does really arrive to influence so much the exhaust system to the compressor in this way !!?

Something inside the round Bosch Camshaft adjusting position sensor ?

A sort of protection inside the Ecu.?

Would be nice to discover if there are suggestions to diagnosis the MAF- and then maybe to clean “by myself” (Before to decide to buy a new one).

Cheers
Claude
(See enclosed Photo)
 

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I'm far from an expert on these cars but as most of the experts on this great forum would recommend investment in an independent or main dealer with the star diagnosis is probably the correct way forward and will save you time and money in the long run.
 
Have you checked the fuses?
 

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