W211 Engine Oil Leak ?

[WML888]

Need help:

Oil leaks in areas circled in brown (right above Supercharger)

1) Is this normarlly caused by faulty Supercharger ? (mileage is ~85,000km, 2006 E200ML)

2) If not, what are the potential problem ? (ie : gasket or seal need to be replaced)

Thanks in advance.

[g8crasher]

Hi WML888,

Looks like you have a commonly reported problem with the M271 engines. If I'm guessing correctly, you probably have a cam sensor oil leak. If you make a quick peek into each cam sensor wiring harness, oil may have already started seeping in.

Should just be a routine change of o-rings, rubber seals, cam sensors (if needed). This will be the updated isolation wiring part no. you will need to purchase in addition to the rest of the parts - 271-150-27-33 (x 2 pcs). Best to just change the lot as it should cost around a couple of hundred dollars, maybe $500 mark.

[funng]

Hi Bro,

Just changed mine two services ago. MBM told me it was rubber hose "crack" i.e. rubber hose harden. Had to be changed before oil reaches a sensor.

Set me back about $100-200 (sorry can't remember exact because it was included in service)

[Cklasse]

Please get the seal change to stop oil leaking ASAP. This oil seeping into the wiring harness will cost you a lot of money to replace.

[blackmercs]

Check yr engine oil too see whether is it kopi with milk color or not, if yes better send it for overhaul.

[WML888]

Update :

Just changed the seal at cam sensor, and added Isolation Wire (to nip the butt of future problem, if any).

Good that I spotted the leak at early stage, and fixed it.

Thanks again for your help.

[WML888]

Hi WML888,

Looks like you have a commonly reported problem with the M271 engines. If I'm guessing correctly, you probably have a cam sensor oil leak. If you make a quick peek into each cam sensor wiring harness, oil may have already started seeping in.

Should just be a routine change of o-rings, rubber seals, cam sensors (if needed). This will be the updated isolation wiring part no. you will need to purchase in addition to the rest of the parts - 271-150-27-33 (x 2 pcs). Best to just change the lot as it should cost around a couple of hundred dollars, maybe $500 mark.

Did a quick research :

Isolation wires (2), to prevent future leakage, (271-150-27-33)

Cam Sensors (2), to stop the existing leakage, (271-051-01-77)

O-ring (2), installed with cam sensor, (010-997-23-48)

Rubber plugs (2), installed with cam sensor, (271-051-00-32)

Thanks again.

[kepiting1sg]

I paid KBS $3K to rectify & prevent future similar problems on my previous w203.

Engine wire harness was change including some sensors.

[WML888]

_{Update :}

_{Just changed the seal at cam sensor, and added Isolation Wire (to nip the butt of future problem, if any).}

_{Good that I spotted the leak at early stage, and fixed it.}

_{Thanks again for your help.}

[g8crasher]

_{Update :}

_{Just changed the seal at cam sensor, and added Isolation Wire (to nip the butt of future problem, if any).}

_{Good that I spotted the leak at early stage, and fixed it.}

_{Thanks again for your help.}

Glad you got it rectified. Here's to more trouble free years ahead with your car. Cheers.

[Penyekz]

Can I ask how much you guys spent on the repairs? I've noticed a little oil around the area mentioned but slightly lower. I hope this will be covered by the warranty. Did you actually change the cam sensors or just the seals?

[MBENZ]

happened to both my w211 and w203, since both using same 271 engine. $500 fixed it all. better fix the leak before the oil seeps into the electrical components

[WML888]

happened to both my w211 and w203, since both using same 271 engine. $500 fixed it all. better fix the leak before the oil seeps into the electrical components

After changed the seals (and cam sensors, if needed), would be good also to add Isolation Wire (no chance for any oil sippage into wire hardness)

[WML888]

After changed the seals (and cam sensors, if needed), would be good also to add Isolation Wire (no chance for any oil sippage into wire hardness)

Here are the Isolation Wires :

[Penyekz]

Here are the Isolation Wires :

Image not working bro!

[SkyHawk]

Hi Bro

Can anyone advice where to fix this problem? Any good recommendation?

[SkyHawk]

Did a research and found this:

https://docs.google.com/viewer?a=v&q=cache:z20ZszIiwTQJ:www.peachparts.com/shopforum/attachments/tech-help/93955d1310993747-o2-sensor-2002-c230k-sc-cam-solenoid-m111-m271.pdf+&hl=en&gl=sg&pid=bl&srcid=ADGEESidJD1k5QetVa8jSR1EXLCf329r-cEg_czEaNQHlDlgoADcg-_SPkaCK14UyQ69rqWpWa2whaZy33nJUsyNJjp-fFLVbSSleI-6v1DqvItdiEHmagEfgxl4LZuYXaFwdqchS9Ji&sig=AHIEtbSJp2bn0NK6Urrq-8HYzwRGhEntMw