C218 CLS63, 2011 - 2019

CLS in the shop

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Old 10-17-2019, 04:20 PM
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2012 CLS63
CLS in the shop

Had an 02 sensor replaced and another one failed not five miles after I left the shop. Having that replaced today and discovered another problem: There is oil inside the engine wiring harness due to cam position sensors that are letting the oil get by in the connector. That was from one of the shop guys. Having that fixed too.....all in it's going to run me about 1700 or so for parts and labor.

Any input welcome.



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0mercy (01-02-2020)
Old 10-18-2019, 07:31 PM
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CLS 63 and M4
Originally Posted by hyperion667
Had an 02 sensor replaced and another one failed not five miles after I left the shop. Having that replaced today and discovered another problem: There is oil inside the engine wiring harness due to cam position sensors that are letting the oil get by in the connector. That was from one of the shop guys. Having that fixed too.....all in it's going to run me about 1700 or so for parts and labor.

Any input welcome.



the positioning sensor is an easy fix. I’ll have to look up the thread but someone did it at home and got the part from ECS Tuning. Not really much harder than changing the air filter. Hardest part is cleaning the harness.

im headed to dinner but will look it up for you. Hope I’m not too late and you haven’t already shelled out for it
Old 10-18-2019, 07:45 PM
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here ya go...

https://mbworld.org/forums/w218/6946...m-sensors.html
Old 10-18-2019, 08:31 PM
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Thanx Mavrick, I even had posts in that too. The shop said it wasn't as bad as expected and I hope it doesn't still cost me that much but it's in the shop over the weekend with the go ahead to fix so I'll find out more soon, thanx again for the reply!
Old 10-21-2019, 03:15 PM
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Had to have all 4 cam sensors replaced, thankfully none got into the ECU, oil did get into the wiring harness but wasn't as bad as they've seen in the past.......visit cost was 1300 and that included another 02 sensor. Hope this info helps anyone else in this situation.
Old 10-24-2019, 02:40 PM
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Originally Posted by hyperion667
Had to have all 4 cam sensors replaced, thankfully none got into the ECU, oil did get into the wiring harness but wasn't as bad as they've seen in the past.......visit cost was 1300 and that included another 02 sensor. Hope this info helps anyone else in this situation.
Common Bro, we all promised ourselves that we would all have that checked and now this happened to you. Speaking of that I need to check mine too before I even have that issue. Oh and mad respect for buying your car brand new and still riding it till this day!
Old 10-24-2019, 03:59 PM
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Thumbs up

Originally Posted by Terence E ENoh
Common Bro, we all promised ourselves that we would all have that checked and now this happened to you. Speaking of that I need to check mine too before I even have that issue. Oh and mad respect for buying your car brand new and still riding it till this day!
Haha, thanx man....I really enjoy this car a lot.......it's one of those things that just ;makes me happy' you know? The ride, the look of the car........still just really captivating to me!
Old 11-01-2019, 02:51 PM
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Upcoming work:

Brake flush
Replace spark plugs
AND
Reseal the engine timing cover, right front engine cover due to very minor leak.......

Could that be why my car has been running a little hotter? Only about 9-12 degree's hotter, but I def notice it on the temp gauges......
Old 01-02-2020, 09:51 AM
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2010 S550 + 2014 CLS63 + 1993 300zx TT + 2014 Pathfinder + 2013 Hyundai Sanata
Similar problem

I have a 2014 CLS63 AWD with 30k miles and Renntech tune. Unfortunately I had a misfire issue a few days ago. When I took the car in the mechanic found a fouled out spark plug. I could have replace only 1x but I decided to do them all at once. 3 days later and almost six hundred bucks short my car CEL came on again. I checked the code myself this time and it reads P2099 which is O2 sensor. I’m wondering if this may be caused due to resonator delete / possible exhaust leak. However, I don’t know why this would just now be an issue after almost a year since the delete.

Originally Posted by hyperion667
Had an 02 sensor replaced and another one failed not five miles after I left the shop. Having that replaced today and discovered another problem: There is oil inside the engine wiring harness due to cam position sensors that are letting the oil get by in the connector. That was from one of the shop guys. Having that fixed too.....all in it's going to run me about 1700 or so for parts and labor.

Any input welcome.



Old 01-02-2020, 12:05 PM
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Originally Posted by 0mercy
I have a 2014 CLS63 AWD with 30k miles and Renntech tune. Unfortunately I had a misfire issue a few days ago. When I took the car in the mechanic found a fouled out spark plug. I could have replace only 1x but I decided to do them all at once. 3 days later and almost six hundred bucks short my car CEL came on again. I checked the code myself this time and it reads P2099 which is O2 sensor. I’m wondering if this may be caused due to resonator delete / possible exhaust leak. However, I don’t know why this would just now be an issue after almost a year since the delete.
From my experience I think the sensors were failing due to the harness issue I was having.

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