View Poll Results: Does your 2020+ E63S have an RMS leak?
Repaired and leaking again
0
0%
Voters: 20. You may not vote on this poll
Is RMS leak potential (inevitably?) a deal breaker
Thread Starter
Junior Member
Joined: Jan 2020
Posts: 19
Likes: 1
AMG
Is RMS leak potential (inevitably?) a deal breaker
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
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
MBWorld Fanatic!
Joined: Jul 2013
Posts: 2,591
Likes: 809
From: Toronto, Ont, Canda
go fast grocery getter wagon
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.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
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
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
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,567
From: unbegrenzt
2017 GLE350 4MATIC
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.
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.
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MBWorld Fanatic!
Joined: Mar 2006
Posts: 4,278
Likes: 377
From: San Jose area
'19 E63S sedan
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.
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Senior Member
Joined: Jan 2016
Posts: 337
Likes: 82
'15 E63S,'21 LCI M5
MBWorld Fanatic!
Joined: Jul 2013
Posts: 2,591
Likes: 809
From: Toronto, Ont, Canda
go fast grocery getter wagon
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
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
Last edited by bobblehead; Jan 7, 2024 at 08:53 AM.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
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.
MBWorld Fanatic!
Joined: Mar 2006
Posts: 4,278
Likes: 377
From: San Jose area
'19 E63S sedan
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.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
Last edited by HBerman; Jan 8, 2024 at 06:42 AM.
Senior Member
Joined: Sep 2023
Posts: 303
Likes: 183
2023 E63S AMG - Grey Magno
I'm hoping the RMS is overexaggerated on these forums because this is my first MB and it worries me a bit
Senior Member
Joined: Sep 2023
Posts: 303
Likes: 183
2023 E63S AMG - Grey Magno
Senior Member
Joined: Apr 2004
Posts: 300
Likes: 84
From: Idaho
'19 E63S
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 . . .
Super Member
Joined: Mar 2021
Posts: 509
Likes: 216
From: Beech Mountain, NC
E63s SL550 GL450
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.
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.
Senior Member
Joined: Jan 2016
Posts: 337
Likes: 82
'15 E63S,'21 LCI M5
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.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,567
From: unbegrenzt
2017 GLE350 4MATIC
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.
Senior Member
Joined: Jan 2016
Posts: 337
Likes: 82
'15 E63S,'21 LCI M5
Member
Joined: May 2023
Posts: 173
Likes: 175
2023 E63S Wagon
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.
