CameronCali

I’m coming from a C63S coupe and am looking to get a 20k mile E63S for a dad mobile.

I’m reading a lot about the horrors of fixing the RMS leak… I wouldn’t even want a small one and leak in friends/families garages/street.

Is the RMS leak really that common?

Thanks everyone

bobblehead

Do remember this forum only contained a tiny fractions of worldwide registered e63 owners of 2020, 2021 and 2023 is being way too new to have any issue. The engineering has not changed since the introduction of the w213.

HBerman

My former 2021 wagon had no oil leaks at 20,451 miles.

DrSkywalker

Our 2020 E63s wagon with 45k+ hasn't shed a drop.

Captain Cosik

2018 wagon at 46K miles (second owner) not a single issue.

chassis

The mileages in the responses are low. Inconclusive to say, based on low mileage, how likely the oil vapor separator failure is or will be.

Oil vapor separator failure leads to RMS failure. There have been reports on this site of M177 RMS failure not caused by oil vapor separator failure, but these reports are fewer than RMS failures caused by collateral damage from failed oil vapor separators.

The question to ask yourself is, how long will you own the vehicle? For short duration and low mileage ownership, in accordance with the responses so far, you could escape unscathed. Hopefully. Maybe.

If you are seeking a longer term relationship (4 years or approaching 100k miles), either plan financially for an RMS replacement job, buy an expensive warranty or skip this car.

Expensive warranties are not guaranteed to solve the financial problem and they do not solve the time/inconvenience problem.

nyc_amg

59000 miles 2018 E63S no RMS issue.

whoover

The part numbers for the recently replaced oil separators on my E63S are updates to the original part numbers. I'm hoping that the problem has been fixed for cars with the new parts, but time will tell.

SilverE5588

Mind adding the new part #'s here if you don't mind ?

bobblehead

These seems to be the latest … late 2023



177-078-54-00 OIL SEPARATOR

177-078-55-00 OIL SEPARATOR

012-990-50-04 CAPSCREW W HEXAL

DRIVE

177-010-37-08 CRANKCASE COVER

13 000000-001144 HEXALOBULAR BOLT

1 Q-1-03-0005 G 40 ANTIFREEZE

2 002-989-06-03-12 TRANSMISSION FLUID

1 177-201-09-00 ELASTOMER MOLDED SEAL

012-990-50-04 CAPSCREW W HEXAL


mine was replaced with the same parts in Dec 2022, except crankcase cover was not replaced at the time

HBerman

The part numbers for repair are not going to correspond to the engine in the vehicle, but rather to the replacements. The engine is built on a totally separate assembly (one builder), but the part numbers are not carried over to the final assembly. I don't know how much time elapses from AMG engine completion to final assembly. Regardless, from all of the reports herein, it appears to be a crap shoot as to if/when there will be an RMS failure. One poster found a vehicle which had the repairs completed and which had another failure within 600 miles.

whoover

I'm not sure what you mean, but the new oil separator 177-078-54-00 replaces 177-078-14-19 and 177-078-30-00. 177-078-55-00 replaces 177-078-15-19 and 177-078-31-00.

HBerman

What I mean is that you can't tell the part numbers of the final assembly on the car. You only know what are the new replacement part numbers.

figuwx

Honestly i think it is like all forums, we are but a subset of owners.

If it helps any
2018 E63s

134,457 (two weeks ago)

No RMS issues. Even in -13F ambient temps.

zukmeister

Impressive mileage? Original owner? If not, how do you know RMS wasn't replaced before?

I'm hoping the RMS is overexaggerated on these forums because this is my first MB and it worries me a bit

sixfive

70k here and just had mine done

zukmeister

Hello fellow Idahoan. Still want to meet up when the weather gets a bit nicer in spring. Mine is sitting under the cover currently

Are you driving it with all this snow on the ground? How does it do?

sixfive

hi there
Absolutely would love to do that! I sure am except today I couldn't because after the snow plow cleaned the road in my neighborhood, they put a huge pile of snow into my driveway and I haven't had a chance to remove it yet so I had to take wife's GLE. But I'm planning on cleaning that today and use her again. Otherwise I have not had any problems what so ever! Just have to watch for all the other idiots thinking the hugely extended stopping distance on ice doesn't apply to them in their big 4x4 trucks . . .

Sunbeltgolfer11

I do recall one owner reporting the RMS failure at 18,000 miles. I don't remember what year the car was. If you plan to own one of these cars I think you should resign yourself to the fact that there is likely going to be an issue with RMS at some point.

SilverE5588

Looking at a 213 in the 65-70k mi range . Had a ppi done & no rms leak detected . Separators are original , I guess I can send it & forget it . Or pre-emptively do them my self. Have the wis for the separators , while it's not a walk in the park it is doable. Any opinions, looks like most are leaving them alone.

chassis

Change the separators. What is the argument to the contrary?

SilverE5588

Yeah the contrary isn't good ha. If I pick it up - I will get the separators/related parts & make a diy. Has anyone I missed here done them diy yet

graphitegreyamg

Not an easy job. I saw the car at the shop with just the small part of the separators exposed for R&D work to install a catch can and saw the separators dissected first hand. To get to the one inch exposed corner of the separator needed the left-side engine harnesses moved out of the way. It’s a tight fit as it is. Coolers, I would think also, need to be removed.