GLC300 Oil Leak
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S550 V8, CL600 V12, SLK32 AMG
GLC300 Oil Leak
Wife has a 2020 GLC300 with around 30k miles on it. I maintain it religiously, change oil with Mobile 1 ESP every 3000 to 4000 miles (don’t judge me)
Anyway, 3000 miles ago the plastic cladding under the car was dry and clean. This time when I took it off there was a spray of oil on it. Seems to have a leak or seepage front engine somewhere. I cannot pinpoint it, but seems to be in the area of the front of the engine. It is not so bad that she will run out of oil and I will check it, but I don’t like it. Its not the cam adjustment sensors. Have another Merc and know about those.
Cannot find anything on the TSB’s about oil leaks. Might have to take to dealer, but it’s a bit of a drive. If I can fix it, so much better.
Are there any known issues with this car with oil leaks?
The leak is more of a spray, so its difficult to find.
I know there is an old recall for oil feed lines that may leak. But this car was not recalled for it.
Anyway, 3000 miles ago the plastic cladding under the car was dry and clean. This time when I took it off there was a spray of oil on it. Seems to have a leak or seepage front engine somewhere. I cannot pinpoint it, but seems to be in the area of the front of the engine. It is not so bad that she will run out of oil and I will check it, but I don’t like it. Its not the cam adjustment sensors. Have another Merc and know about those.
Cannot find anything on the TSB’s about oil leaks. Might have to take to dealer, but it’s a bit of a drive. If I can fix it, so much better.
Are there any known issues with this car with oil leaks?
The leak is more of a spray, so its difficult to find.
I know there is an old recall for oil feed lines that may leak. But this car was not recalled for it.
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Joined: Apr 2016
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From: NW
2018 GLC 4MATIC
Any pictures you can provide? Don't recall issues like this on GLCs.
When I did tranny oil change a few months ago, I've notice wet spot at the back of the engine but I wouldn't call it a leak. My GLC has 40K mikes on it.
P.S. i do change the oil every 2.5K or 3K miles, so don't judge me ))
When I did tranny oil change a few months ago, I've notice wet spot at the back of the engine but I wouldn't call it a leak. My GLC has 40K mikes on it.
P.S. i do change the oil every 2.5K or 3K miles, so don't judge me ))
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From: unbegrenzt
2017 GLE350 4MATIC
Yes, pics please. Wipe some oil with your finger and smell it. It might be AC compressor oil. If engine oil it might be from the engine oil cooler since you describe it as a spray.
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S550 V8, CL600 V12, SLK32 AMG
Can see the oil on the edges of the hose at the bottom. I cleaned the plastic pan a week or so ago, so no oil there. Taking to dealer in few weeks. But something there is leaking
Last edited by waterzap99; Jul 14, 2023 at 10:27 AM.
Out Of Control!!
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Posts: 14,666
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From: unbegrenzt
2017 GLE350 4MATIC
Agreed, it looks like that tube is leaking. Is anything above the tube, that would be the source of the leak? Where is the oil fill cap? Often lube techs spill oil in the area of the fill cap and it can be mistaken for a leak.
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Thread Starter
Senior Member
Joined: Jul 2023
Posts: 296
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S550 V8, CL600 V12, SLK32 AMG
Nothing. Took to the dealer, they could not find it. Also its not back. So must have been something small and it probably got plugged up? I am still keeping my eye out for it, but thankfully its gone for now.
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From: Richmond, Virginia USA
'12 E550, '10 ML350, '06 E350, '20 GLC300, '21 GLC300
I once had a really slow oil leak. It was one of the o-rings related to the oil filter. Change the oil. Clean the shields up. Took more care with those orings during oil changes from then on.
