Oil can leak into the engine wiring harness from the camshaft sensor. If the leaky sensor is not repaired, the oil can migrate through the wires and possibly damage the engine control unit. Have the sensor and harness checked regularly.
Car Problem Reports
Mercedes-Benz C230 Oil Leak Into Wiring Harness From Camshaft Solenoid Switch
Mercedes-Benz C230 Problem
Average Mileage: 92,240 mi (49,800 mi - 167,500 mi)
Visitor, 2005 Mercedes-Benz C230
camshaft leaking oil
Visitor, 2004 Mercedes-Benz C230, 60,000 mi
Routine maintenance check. MB fixed it and replaced the harness.
Visitor, 2003 Mercedes-Benz C230, 90,000 mi
Dealer is give us the running around. Change the CamShaft solenoid but does not want to change the wiring harness saying its not included in the recall.Anyone has any idea on how to get them to repair this know defect?
Visitor, 2005 Mercedes-Benz C230, 49,800 mi
Oil leaking into wiring harness from CAM sensor I am told by my mechanic today. I did find online however that this is a RECALL issue for this car and I am now taking into the Benz Dealer for repair and hope the Engine Check light goes off. This car has run perfectly since day one and really doesn't even appear to be running poorly with the light on. I run it on synthetic Mobil One 5-40 and change it regularly.
Oil leak into wiring harness from camshaft solenoid
Visitor, 2002 Mercedes-Benz C230
Same issue at 80,000 miles on my 04 kompressor. Dealer changed harness adapters but didn't fix underlying cause of the oil. Refuses to help after fix it now or ask MB for help.
I went to dealer for the recall (California) the replaced everything harness computer magnets the car had the same problem camshaft solenoid timing. They charge me 350.00 to see the chain tensioners that were perfect then they wanted to open the chain covers for 2800.00 I told them I didn't trust them, did some work I found they didn't replace the timing sensor intake on left side of the engine I ordered the part one bolt and replaced it, check engine light finally went out.
Went back to dealer and they gave me back the 350.00 they charged me to see the tensioners and the chain.
Don't trust dealers
In Calif. it's required to get car smog checked every two years, after it's 6-years-old. My 2004 C230 Kompressor runs fine, same performance and gas mileage as when it was new. However the Check Engine Light is always on. A "CEL" is an automatic smog check failure. I can't renew registration, even though my car passes the tailpipe emissions test by a wide margin. The OBD codes (136 & 141) which triggers the CEL indicate a problem with the downstream (i.e. after the catalytic converter) oxygen sensor. Dealer wanted $700+ to replace it. The part costs $109 at AutoZone or Amazon, so I was going to replace it myself. (I've got more time than money, after the company I worked for was sold and I was let go.) I unscrewed the O2 sensor from the exhaust manifold and then when I unplugged the connector at the other end, motor oil poured out. Going online, I learned about this known, common problem: motor oil leaking into the wiring harness. And that sometimes, years after the original warranty expired, Mercedes paid for the repair of this known defect. I called the service writer at the dealer who quoted me $700+ to replace the O2 sensor. He was so excited. He said, "This could be a lot more than $700; it could be thousands!". He refused to check if this known common defect is something Mercedes might pay for. As far as he was concerned, my only option was to bring the car in and authorize a charge of at least $152 for them to tell me what's wrong. Comments anyone?
Visitor, 2002 Mercedes-Benz C230, 125,000 mi
noticed a oil leak from camshaft magnetic cover, the oil have found its way into the sensor connector but the engine light nor malfunction messsages have com on. i removed cover (3 screws), cleaned surfaces and applied gasket silicone, put the cover back on, havent started it on to test result. if anyone has the right fix for this i will appreciate if let me know. TY.