GL 450 Oil Leaking on Wiring Harness??
#26
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2016 E400 Coupe (C207)
Please forgive my ignorance; I have been reading various related threads and find myself very confused.
I have a 2016 E400 coupe (C207), which I believe is the M276 engine - is that correct?
The "Camshaft Control Valve Solenoid" part number on my engine is 276-156-07-90, which replaced old part number 276-156-04-90. Is this newer, replacement part designed to address the oil-in-the-wiring-harness problem, or is my engine still susceptible to this?
I have a 2016 E400 coupe (C207), which I believe is the M276 engine - is that correct?
The "Camshaft Control Valve Solenoid" part number on my engine is 276-156-07-90, which replaced old part number 276-156-04-90. Is this newer, replacement part designed to address the oil-in-the-wiring-harness problem, or is my engine still susceptible to this?
Last edited by Mr. Toad; 08-23-2022 at 10:04 AM.
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chassis (08-23-2022)
#27
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2017 GLE350 4MATIC
Please forgive my ignorance; I have been reading various related threads and find myself very confused.
I have a 2016 E400 couple (C207), which I believe is the M276 engine - is that correct?
The "Camshaft Control Valve Solenoid" part number on my engine is 276-156-07-90, which replaced old part number 276-156-04-90. Is this newer, replacement part designed to address the oil-in-the-wiring-harness problem, or is my engine still susceptible to this?
I have a 2016 E400 couple (C207), which I believe is the M276 engine - is that correct?
The "Camshaft Control Valve Solenoid" part number on my engine is 276-156-07-90, which replaced old part number 276-156-04-90. Is this newer, replacement part designed to address the oil-in-the-wiring-harness problem, or is my engine still susceptible to this?
Posters on this site seem to have fewer/no problems with the latest part number in the EPC system.
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2016 E400 Coupe (C207)
Can anyone tell me the orientation of the wiring connection on the old part number 276-156-04-90? My engine has the revised 276-156-07-90 part and the plugs connect at the top of the Camshaft Control Valve Solenoids. I'm just wondering whether the point (e.g., top, side, or bottom) at which the wiring connects to the solenoid might have an impact on the potential for leaked oil to creep into the harness.
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2017 GLE350 4MATIC
Can anyone tell me the orientation of the wiring connection on the old part number 276-156-04-90? My engine has the revised 276-156-07-90 part and the plugs connect at the top of the Camshaft Control Valve Solenoids. I'm just wondering whether the point (e.g., top, side, or bottom) at which the wiring connects to the solenoid might have an impact on the potential for leaked oil to creep into the harness.
The theory on the table is that the cam position sensors fail by allowing oil to escape the sensor body, onto the sensor pins. From there the oil migrates to the harness terminals, and via capillary action into the harness.
Gravity does not play a role in capillary action. Capillary action is what transports the oil from the failed sensor to the ECU, injectors and O2 sensors.
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biker349 (08-26-2022)
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SLK
A lot of great info in this thread... I'm going through this now with my 2015 S550 Coupe, I had purchased it last month with 40k miles, lucky for me the dealer is covering it all, I'm told it's close to a 9k job since they have to pull the engine out.
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2016 E400 Coupe (C207)
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biker349 (08-29-2022)
#32
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As noted in my previous post, my engine has revised part # 276-156-07-90 (Camshaft Control Valve Solenoid), which replaced old part # 276-156-04-90. The redesigned part mounts with the electrical connecting plug facing up. I don't know what the orientation was on the old part, and I was simply asking whether the upward orientation might impact oil ingress into the wiring harness.
Do you hold the belief that the original part had an orientation different than the part in your engine?
ebay E400 engine shows solenoid connector "up" orientation. No way of knowing if the solenoid is factory or not.
https://www.ebay.com/itm/35369780447...Bk9SR5TlmdXbYA
Last edited by chassis; 08-26-2022 at 11:27 PM.
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biker349 (08-29-2022)
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2016 E400 Coupe (C207)
Do you hold the belief that the original part had an orientation different than the part in your engine?
ebay E400 engine shows solenoid connector "up" orientation. No way of knowing if the solenoid is factory or not.
https://www.ebay.com/itm/35369780447...Bk9SR5TlmdXbYA
ebay E400 engine shows solenoid connector "up" orientation. No way of knowing if the solenoid is factory or not.
https://www.ebay.com/itm/35369780447...Bk9SR5TlmdXbYA
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biker349 (08-29-2022)
#34
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