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I ended up ordering a new plastic hose and check valves as mentioned in my posts above, It's the oem part. Today is 2wks now since I've been waiting for the part with no eta as of now. Called mb of Hoffman estates and only 2 available in the entire country, 1 spoken for, other selling for 160 dollars, where fcp sells it for 47 shipped. Amg tax because if you want it, you will pay double or even triple for it. Guess the route I took.. Yes still waiting 😔
I ended up ordering a new plastic hose and check valves as mentioned in my posts above, It's the oem part. Today is 2wks now since I've been waiting for the part with no eta as of now. Called mb of Hoffman estates and only 2 available in the entire country, 1 spoken for, other selling for 160 dollars, where fcp sells it for 47 shipped. Amg tax because if you want it, you will pay double or even triple for it. Guess the route I took.. Yes still waiting 😔
Mojo are you referencing pn# 2044304029 ? This is the hose I am trying to find, looks like the one S-Pri pictured above. It says discontinued on FCP and cannot find elsewhere either
Does anyone know if there is a replacement pn# or alternative for this 3 way hose? Mine is an m278 (14 e550 coupe), however my 15 s550 coupe w m278 has a different hose too :/
Mojo are you referencing pn# 2044304029 ? This is the hose I am trying to find, looks like the one S-Pri pictured above. It says discontinued on FCP and cannot find elsewhere either
Does anyone know if there is a replacement pn# or alternative for this 3 way hose? Mine is an m278 (14 e550 coupe), however my 15 s550 coupe w m278 has a different hose too :/
Mojo are you referencing pn# 2044304029 ? This is the hose I am trying to find, looks like the one S-Pri pictured above. It says discontinued on FCP and cannot find elsewhere either
Does anyone know if there is a replacement pn# or alternative for this 3 way hose? Mine is an m278 (14 e550 coupe), however my 15 s550 coupe w m278 has a different hose too :/
After re-re-reading the thread above I see where S-Pri tried to spell out the updated part # needed for mine.
Dealer has one coming in tomorrow from NJ for $43, and I do seem to need it. Also replacing the centrifuge piece while I’m at it.
Today doing the o2 sensors. Started with the rear ones as they were in stock locally…though the easier set, getting my big hands up to the plugs has been a real PITA
After re-re-reading the thread above I see where S-Pri tried to spell out the updated part # needed for mine.
Dealer has one coming in tomorrow from NJ for $43, and I do seem to need it. Also replacing the centrifuge piece while I’m at it.
Today doing the o2 sensors. Started with the rear ones as they were in stock locally…though the easier set, getting my big hands up to the plugs has been a real PITA
That one was the only one in the states from what I was told. Mine says it got delivered today from fcp, so hopefully it's the right one!
Edit: my wife went home for her lunch break and it's the right hose!! So yes the number S-Pri has is the correct 3 connection plastic hose on the back top side of motor
Last edited by Mojo20032004; Jul 23, 2024 at 02:39 PM.
Well crap, guess I misread when I re-read! MY part # 2044304029 IS discontinued, and 212430052964 is NOT the replacement for it. It's too short to connect to my brake booster line where it resides currently. Looks like I have to attempt to reroute that line
I'll share this in the E550 group, as this part is not available in Germany or US any longer. Amazes me that MBZ isn't supporting a replacement part for E550 up to 2017 model year!
Ordered the brake vacuum hose from Pelican Parts for my ML63 and replaced it easily, as others mentioned the middle check valve has dimples, the end one does not but I could smell a trace of oil. The old part was date stamped September 2014 and has approx. 64k miles on it.
Haven't noticed any change in engine behaviour since installing the new hose a week ago, not that I had any issues I was hoping this would resolve, just thought it would be another inexpensive and easy preventative maintenance job to tick off the list.
Yep, there is a big size diaghram type check valve there
I've being having intermittent boost lose every couple days. I have already replaced a majority of these components. The one thing I didn't replace was the centrifuge. Here is picture of the housing where the centrifuge is on the right bank and where hose connects to the intake. Would this amount of oil be a bad check valve or bad centrifuge? Engine Crankcase Vent Valve
I know this may not be possible for you hand to access the hose connector......
Blow air into it via its small corrugated hose, the airflow should be blocked by the check valve
If you apply suction to the hose, you will get airflow.
That check valve if it fails, your boost will enter the engine's crankcase and crankshaft oil seals eventually producing oil leak due to higher crankcase pressure.
That small trace of oil is OK.
Good luck on replacing the centrifuge, I know its NOT A FUN job on M278/M157.
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