CL-Class (W216) 2007-Present: CL 500, CL 600

ABC problem

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Old 09-20-2020, 08:38 AM
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cl 550
Question ABC problem

Hello
I have a cl 550 2007 year. I bought a new ABC pump and valve damper, cleaned the system, new oil and filter, but i didnt fix the problem. The car still goes up an down, and when i start the car when the engine cools , i hear a very loud rough noise for 2 secs. Then when i start the car again there is no noise. This happens only when the engine cools down.

Every help is appreciated.

Tom from Croatia
Old 09-20-2020, 04:16 PM
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'07 GL320CDI, '10 CL550
https://www.mbwholesaleparts.com/con...ontrol-ABC.pdf
Old 09-21-2020, 03:35 AM
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thank you for the answer, but i did all of the celaning and still is the problem.
Old 09-24-2020, 03:11 AM
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2007 CL550
Did you swap out the accumulators?
Old 09-26-2020, 04:08 PM
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2007 CL600
What makes you think this is an ABC issue exactly?

The sound and symptoms you're describing to me sounds like a bad timing chain tensioner.

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