SLK-Class (R170) 1998-2003: SLK 200, SLK 230K, SLK 320

SLK/R170: A friend of mine needs help with her 230 Kompressor...

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Old Aug 29, 2011 | 12:43 PM
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Kreuzfeuer's Avatar
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From: Murfreesboro, TN
SRT-6
A friend of mine needs help with her 230 Kompressor...

She sent me a text late last night, saying the car has been dying in traffic once the car is up to full operating temps... She recently took it in for a tune-up ($900 ) and said that didn't fix it. New mechanic she took it to suggested the MAF. I asked her if it was dying or simply losing lots of power, she specified that it's completely shutting off in traffic. She has a MAF on order, but my gut tells me it's something else.

Seems like a CPS to me, but it's weird that it only happens when it's at temp.

Do the 230 Kompressors come with a relay control module like the 320/32 AMG motors? Her mechanic supposedly checked the K40 (?) module, but he said that wasn't it. She's totally lost, cars aren't her thing and I'm too far away to take a poke at it.

Any help greatly appreciated...

--John
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Old Aug 29, 2011 | 12:53 PM
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98 Black C43 , 12’ ML 350 Blutec
CPS -
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Old Aug 29, 2011 | 01:05 PM
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Originally Posted by C43AMG
CPS -
My thinking as well. I was uncertain because I know nothing about the 4-cylinder motors...

She scored a MAF for $58 shipped, I told her at that price it won't hurt to go ahead and replace it since she effectively paid Mercedes $900 for a new air filter

I'll locate a CPS for her car and shoot the link to her. She told me it died w/o warning, no lights or anything. It would, however, immediately start right up.

Thank you for the confirmation!
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Old Aug 31, 2011 | 08:20 AM
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98 Black C43 , 12’ ML 350 Blutec
Originally Posted by Kreuzfeuer
My thinking as well. I was uncertain because I know nothing about the 4-cylinder motors...

She scored a MAF for $58 shipped, I told her at that price it won't hurt to go ahead and replace it since she effectively paid Mercedes $900 for a new air filter

I'll locate a CPS for her car and shoot the link to her. She told me it died w/o warning, no lights or anything. It would, however, immediately start right up.

Thank you for the confirmation!
If she ever gets stranded a quick fix is to dump 1/2 gallon of water along the firewall ( cools sensor down) and she should fire right up !
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Old Jun 21, 2018 | 11:05 AM
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95 SL320
I know this is going to sound funny, but when was the last time you changed the air cleaner...? My car was doing the same thing and I tried everything to no avail and when I changed the air cleaner, it cleared up. Hope this helps.
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