Any idea what might be the source of this leak? It’s rather large in terms of every minute or so it drops a (drop) of oil. It’s coming from above…yet I cannot see from where when you’re up top engine. I will say with cover in place suddenly I had a river of oil leaking. The cover cradles or holds all the oil. Without cover it’s manageable. I mean, not a need to tow auto to dealer. Still drivable. Just an annoyance that needs to be fixed! Let me know thoughts on what’s above that area that could be source (root of leak). Thx!
Most likely the o-ring between the oil filter housing and the engine block. Takes (IIRC) a 46mm socket to remove. While the housing is off, replace the o-rings to the oil cooler attached to the filter housing. https://blog.fcpeuro.com/how-to-fix-...benz-oil-leaks
Most likely the o-ring between the oil filter housing and the engine block. Takes (IIRC) a 46mm socket to remove. While the housing is off, replace the o-rings to the oil cooler attached to the filter housing. https://blog.fcpeuro.com/how-to-fix-...benz-oil-leaks
Thats’s great info! I was looking at that on the fcp euro site and was speculating whether the Timing cover o ring might be the culprit given the location of the leak. I will say with the plastic skid plate installed today I had a sudden accumulated leak of about 1/2 quart and a further 1/2 quart upon removal of the skid plate. I’ve elected to leave of the plate until such time I resolve this leak because the collected oil makes quite a mess. The individual droplets meanwhile are no better…which is why I will examine those o rings at the cooler you mentioned. Thx again
Apologies for late reply. This was in fact the oil filter housing, I would like to add it was at least two quarts only when weather would change from fall to winter. A cold snap at night is wake up to a pool of oil two quarts about under the car. I saw a video of a person complaining about the same exact issues and he mentioned changing out the oil filter housing. That was in fact the problem, there is a black plug with some sort of o ring (not sure if it’s serviceable). I just went to dealer and bought the stock OEM housing. I’ll add btw I broke or needed to source turbo coolant lines as just touching them and they snapped or cracked, obvious garbage Mercedes should have superseded the RHS with metal lines as they are in left. I’m German btw or born in USA but of German parents and I am allowed to tell
my German brethren that they really **** the bed on the coolant lines among other plastic parts
Apologies for late reply. This was in fact the oil filter housing, I would like to add it was at least two quarts only when weather would change from fall to winter. A cold snap at night is wake up to a pool of oil two quarts about under the car. I saw a video of a person complaining about the same exact issues and he mentioned changing out the oil filter housing. That was in fact the problem, there is a black plug with some sort of o ring (not sure if it’s serviceable). I just went to dealer and bought the stock OEM housing. I’ll add btw I broke or needed to source turbo coolant lines as just touching them and they snapped or cracked, obvious garbage Mercedes should have superseded the RHS with metal lines as they are in left. I’m German btw or born in USA but of German parents and I am allowed to tell
my German brethren that they really **** the bed on the coolant lines among other plastic parts
Glad you found the culprit. That oil filter housing leak is a notorious issue on these engines, especially during big temperature swings. The plastic housing warps and cracks, and that black plug's o-ring fails. You're right, it's a terrible design. And you're absolutely right about those plastic turbo coolant lines. They're a known failure point and a nightmare. Mercedes definitely cheaped out there. Replacing them with the metal ones from the LHS is the only real fix. It's frustrating how such simple plastic parts can cause such major problems on an otherwise great engine.
Glad you found the culprit. That oil filter housing leak is a notorious issue on these engines, especially during big temperature swings. The plastic housing warps and cracks, and that black plug's o-ring fails. You're right, it's a terrible design. And you're absolutely right about those plastic turbo coolant lines. They're a known failure point and a nightmare. Mercedes definitely cheaped out there. Replacing them with the metal ones from the LHS is the only real fix. It's frustrating how such simple plastic parts can cause such major problems on an otherwise great engine.
Got any more info on the metal lines and what an "LHS" is ? My S63 is gonna need this eventually.
Got any more info on the metal lines and what an "LHS" is ? My S63 is gonna need this eventually.
Metal lines are the brake lines. LHS is Left Hand Side (of the car). You'll need to replace them when they get rusty or damaged. Common issue on older cars. A good indie mechanic who knows S-Classes can handle it.
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