Kompressor stopped!!!!

[GrahamC230K]

I was driving today and noticed a massive loss of power.

Then I noticed no Supercharger whine either. Basically the car was driving without the Kompressor engaged!!

I stopped and started engine and now fine.

Anyone ever have this?

Is the Kompressor clutch separate and any ideas of costs??

cheers

 

[LeeJSquire]

Hi Graham
I have experienced the same intermittent problem with my SLK for 3 last 3 months. After many visits turns out to have been Air-mass censor controlling fuel mix into Kompressor. Much better now!
Lee

 

[GrahamC230K]

Thanks.

I had a new MAS (Mass Air Sensor) about a week before I had the Kompressor issue, so maybe it was bedding in or adjusting tolerances etc.

It has been fine since touch wood.

 

[GrahamC230K]

It has happened again and is permanent this time it seems.

MB diags say Kompressor clutch is at fault. May be electrical or the actual clutch.

Dealer needs car to investigate further.

Anyone else had this???

 

[Andy]

Hi


If its been on the Star Diagnosis machine & this is the fault they are saying. Then let them carry out the tests & report back first.

We have had a few kompressor engines where the air mass sensor was changed. Then the air flap actuater goes faulty. Not sure whether related or coincedence.


Regards

Andy@ www.mercedesservicing.com

 

[dieselman]

Andy

I had a brief look at this car today and can confirm the clutch itself is good and there is 12v to it at ignition on. The weather was terrible so not too much of a look, but did notice the secondary air feed and control solenoid. Presumably if this sticks the compressor doesn't get switched on.

Nice info.

 

[Andy]

Hi Dieselman

The compressor is fitted under the air flap actuator. I am assuming all air pipes are on. You really need to have live data & actuations. Readily available from the Star Diagnosis. I know you don't have one. But you will need to know what is actually happening electronicaly.

What you really need is a copy of the read out of the fault codes. The dealer or who ever can check the vehicle via star (I don't know of another piece of equipment or soft ware which will do the job effectively).

I must admit the last couple of air flap actuators I have changed have come up with a specific f\code.

If the dealer does fit the compressor & it does not cure the problem. Then you can take it back for a refund????????


Good luck


Andy @ www.mercedesservicing.com

 

[GrahamC230K]

Thanks guys. Will find out Wednesday. The Star Diagnostics specifically said Kompressor Clutch Output Stage failure.

 

[GrahamC230K]

Dealer (Hughes of Aylesbury) has had car 2 whole days now and is unsure still of the fault. Not even a replacement part ordered :evil:

 

[GrahamC230K]

Now awaiting a replacement ECU to see if this is the problem.

 

[Francois]

It would seem that we have entered the age where the people who biuld the cars, doesn't know how it works...

A robot puts it together and after that no-one knows whats going on under the hood. (I do not include people like Andy and dieselman etc., who actually does know, but I do include the dealers et al. that is supposed to know.)

I am sure that if it wasn't for the people that recularly help us out on this forum, our cars would propably be on the scrapyard.

 

[Andy]

Hi all,

To be fair to the dealers. They are dealing with technology which is not tried and tested. Still has buggs in it. As most of you with later cars & those who read this forum regulary will see. Lights come on for any & every reason. Not always is there a fault code in the system. Or a fault code which you can actually do something with. Having now purchased a Star Diagnosis machine. The machine is increadible & I love it. Buttttt it still reliant on the bloke you designed the damm thing in the first place. Even with the technology you can struggle. And the public have been convinced that you plug in a computor and that it. Hey presto thats the problem. I even have customer thinking there 18yr old car has computor diagnostic capabilites. 18yrs ago was the internet around. Did many of us have computors???????? If you did they were unreliable and slow. Anyway I for one do not envy the dealers. They have there work cut out to deliver results to their customers especially on new & nearly new vehicles. Every thing is made to be replaced and not repaired. Also nearly every thing is an arm & a leg. But at the end of the day as Graham is finding out. Nobody wants to order something that wont cure the problem.

Also the machine is only a good or bad as the technician using it.

Good luck any way.

Regards

Andy @ www.mercedesservicing.com

 

[Francois]

You are right Andy, the dealers have their work cut out for them. I just feel that they should not charge such a high rate if they can't deliver a superior service...

(I'm an engineer, spelling and gramar does not apply to me... 8) )

 

[GrahamC230K]

The latest.


ECU was faulty and has been replaced.

Kompressor Air Recirculation Flap (valve) also faulty and replaced (new part on order though).

Yes, they did put old ECU back to see if it worked with the new flap but sadly not.

ECU approx £770
Valve approx £140

Negotiating price now. Car will be ready Tuesday.


Can anyone explain the operation of the recirc flap - might this have been going for a while? Might I notice a difference now?


thanks

 

[GrahamC230K]

Have car back now. Faults as above.

 

[Andy]

Hi

Does that mean the vehicle is still with faults or what?!?!?!?!

Regards

Andy

 

[GrahamC230K]

Sorry, what an unclear post of mine.

Car is back, all rectified, faults WERE as diagnosed.


Have since done 1500 odd miles on a trip to AMG, the Mercedes Classic Centre in Stuttgart and the Nurburgring. Car is faultless and was happy to pull to about 146mph on the autobahn.


Thanks all.

Graham