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CL-Class (W215) 2000-2006: CL 500, CL 600

CL600 ECU Corrosion

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Old Oct 9, 2017 | 09:32 AM
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Cl600 TT
CL600 ECU Corrosion



This is a follow up to my rough running thread

car is a 2003 cl600

I looked at the ECU today and my findings are in pictures , corrosion on pins and inside ECU

can an it be saved or is it toast
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Old Oct 10, 2017 | 03:57 AM
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W215 CL500 2005
You could try cleaning it up with a contact cleaner.
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Old Oct 12, 2017 | 06:11 AM
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Cl600 TT


This is the ECU now , contact cleaner tooth brush and small amount of emery cloth
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Old Oct 12, 2017 | 07:17 AM
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W215 CL500 2005
Originally Posted by stuartph


This is the ECU now , contact cleaner tooth brush and small amount of emery cloth
And, did it work?
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Old Oct 13, 2017 | 07:05 AM
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Cl600 TT
No still the same faults and misfire
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Old Oct 13, 2017 | 09:21 AM
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Have you ever changed the coil packs? Do you have a tune? How do you know the ECU is causing the issues?
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Old Oct 13, 2017 | 11:59 AM
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Cl600 TT
In the cars history file one coil pack has been replaced

i have no no idea if it has a tune on it , anyway of finding out?

The corrosion I found on the ECU and on its plugs , ECU has been sent away for testing today , at least it can be eliminated if it’s ok

No misfire codes are being recorded in the ECU

Throttle pedal is not working with old pedal or new replacement

Idle surges on start up between 1100rpm to 1500rpm then settles on 1100rpm then misfire

very smelly exhaust of over fuleing

Would spark plugs give this fault but not trigger a code

car was running fine prior to this
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Old Oct 19, 2017 | 05:47 AM
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ECU is on its way back to me , the company I used was unable to test the ECU and couldn’t say if it works or not.......

Corrosion found in right sam unit , which has ESP and ECU going through it
Last edited by stuartph; Oct 19, 2017 at 09:21 AM. Reason: Adding info
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Old Nov 1, 2017 | 12:36 PM
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Right Hand sam unit replaced fault still present

I’m trying to get a garage out with star system to help as car is stuck where it is at moment
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Old Nov 10, 2017 | 12:45 AM
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If you still want that ecu tested, give us a call, we might be able to help! +1-888-875-2958
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