Do u have a video of the sound ur car was making ? I hear a rattle from mine too and it drives me crazy but the mechanic says everything is good and normal . I will really appreciate your help
@@raimundasrimkus6252 The fuel quality/quantity sensor. Un plug it. Then start the engine for few minutes, then plug it back in and start again. Should fix the problem. If it doesnt. Buy new sensor
I need to know which part is damaged. Please help! I have exactly the same Noise (OM642) 170.000KM i renewed that: -starter -chain tensioner -glow plugs (6) -oil change (all ok) still the same. i think it's got something to do with the fuel supply
I wrote here already that that I sold this car with this issue. I do not know what caused it, as I never fixed it. Someone here said that he fixed it by replacing exhaust manifolds. Those are double layer, and are known to separate and fail on older OM642s. It's a good guess, but I do not know how to fix this, as I never did fix it. When this car left my possession, it still had the noise.
Popychacze hydrauliczne , jaki masz olej zalany 5w30 ? Mam to samo zmieniłem na olej 5w40 Petronas 229.51 .Jest odrobinę ciszej ale to jest wina oleju 5w30 i dpf
@@MarekRynkiewiczFashionSport why dpf? When I removed plug from HPFP, sound disappeared… when I out plug back I have exactly still same sound, it’s not related to the dpf at all, this is some fuel supply issue…
I have the same rattle altho not as pronounced on my 2007 ML280 with 370.000km. I suspect its just bit loose thermal sheet in engine bay vibrating at certain RPM, I'll probably visit mercedes service in coming weeks
Sabin Mihu I Never solved this. Timing chain and headers where fine. One guess was that the high pressure fuel pump was rattling. The rattle came from the driver side (LHD) bank. I didn’t want to pay to find out so I traded this car like 2 years ago. I heard lately that the guy who bought it is still very happy with the car. I Don’t know if this rattle has escalated to a problem.
I replaced the timing chain and tensioner after that video. I sold this car 5 years ago. This car still has the original engine and going strong. It has done about 70 000km since I sold it. I don't think any damage was done.
I replaced the timing chain even when the tensioner looked fine. The shop that replaced the chain, said that it was unnecessary. These engines rattle loud on startup if the timing chain is streched or loose. Mine did not. Some guy mentioned earlier on these comments that he replaced exhaust manifold flex pipe that are also known to fail on these engines. He apparently got rid if the noise. I sold this car over 3 years ago with this rattle. Never fixed it so I can’t help. Sorry.
Exactly the same as mine! No noise on startup .The first 30 seconds when you rev the engine the noise isnt there.After 30 seconds it shows up.How much time did you drive your car with that noisev
@@arlishehu9505 sorry but I can’t remember. Probably something like 5000 - 10000km before I sold the car with the noise. It did not get worse during that time. Apparently the guy who bought it from the dealer I sold it to was very happy with the car about 1 year later, so the engine had probably not failed.. I have never talked with the guy, so I have no idea of what (if) something was done to the noise.
@@amillhouse7087 Unfortunately did not find it. Noise still there, apart from that car running fine. I have heard a lot of om642 engines with that noise, i think its typical for them to suffer from that rattle
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I have the same noise. Comes from high pressure fuel pump, a service bulletin i found says this noise is the pump adjusting fuel quantity. :)
so this sound should be as it is?
@@alexandrutache3515 you are right , i went to the mechanic and he said the same thing
Drivers side manifold flex pipe. Just fixed mine with the same issue.
Do u have a video of the sound ur car was making ? I hear a rattle from mine too and it drives me crazy but the mechanic says everything is good and normal .
I will really appreciate your help
Are you sure it was the exact same sound?
what turned out to be the problem as i have the same noise
Check high pressure pump.
how u can check HPFP? I even changed new one and sound still same :(
@@raimundasrimkus6252 The fuel quality/quantity sensor. Un plug it. Then start the engine for few minutes, then plug it back in and start again. Should fix the problem. If it doesnt. Buy new sensor
I need to know which part is damaged.
Please help! I have exactly the same Noise (OM642) 170.000KM
i renewed that:
-starter
-chain tensioner
-glow plugs (6)
-oil change (all ok)
still the same. i think it's got something to do with the fuel supply
I wrote here already that that I sold this car with this issue. I do not know what caused it, as I never fixed it. Someone here said that he fixed it by replacing exhaust manifolds. Those are double layer, and are known to separate and fail on older OM642s. It's a good guess, but I do not know how to fix this, as I never did fix it. When this car left my possession, it still had the noise.
Popychacze hydrauliczne , jaki masz olej zalany 5w30 ? Mam to samo zmieniłem na olej 5w40 Petronas 229.51 .Jest odrobinę ciszej ale to jest wina oleju 5w30 i dpf
@@MarekRynkiewiczFashionSport why dpf? When I removed plug from HPFP, sound disappeared… when I out plug back I have exactly still same sound, it’s not related to the dpf at all, this is some fuel supply issue…
Why?
Did you fix it?
NicoToscani I did not
I have the same rattle altho not as pronounced on my 2007 ML280 with 370.000km. I suspect its just bit loose thermal sheet in engine bay vibrating at certain RPM, I'll probably visit mercedes service in coming weeks
@@Taikafirr - What about now? Mine does the same. Please help. Thanks.
Sabin Mihu I Never solved this. Timing chain and headers where fine. One guess was that the high pressure fuel pump was rattling. The rattle came from the driver side (LHD) bank. I didn’t want to pay to find out so I traded this car like 2 years ago. I heard lately that the guy who bought it is still very happy with the car. I Don’t know if this rattle has escalated to a problem.
@T3TRAH3DR0N What did you do, did you fix it?
I sold this car like 2 years ago...
Keep revering it like that and for sure you’ll damage or at least reduce the life of the components. Not smart!
I replaced the timing chain and tensioner after that video. I sold this car 5 years ago. This car still has the original engine and going strong. It has done about 70 000km since I sold it. I don't think any damage was done.
My car has the exact same sound and thr mechanich told me it is the timing chain. Is this true?
I replaced the timing chain even when the tensioner looked fine. The shop that replaced the chain, said that it was unnecessary. These engines rattle loud on startup if the timing chain is streched or loose. Mine did not. Some guy mentioned earlier on these comments that he replaced exhaust manifold flex pipe that are also known to fail on these engines. He apparently got rid if the noise. I sold this car over 3 years ago with this rattle. Never fixed it so I can’t help. Sorry.
Exactly the same as mine! No noise on startup .The first 30 seconds when you rev the engine the noise isnt there.After 30 seconds it shows up.How much time did you drive your car with that noisev
@@arlishehu9505 sorry but I can’t remember. Probably something like 5000 - 10000km before I sold the car with the noise. It did not get worse during that time. Apparently the guy who bought it from the dealer I sold it to was very happy with the car about 1 year later, so the engine had probably not failed.. I have never talked with the guy, so I have no idea of what (if) something was done to the noise.
@@arlishehu9505 I have the exact same noise after 30 seconds from startup. Did you found out what the noise is?
@@amillhouse7087 Unfortunately did not find it. Noise still there, apart from that car running fine. I have heard a lot of om642 engines with that noise, i think its typical for them to suffer from that rattle
Wanna sell it ?
Yes
@@albert_zweistein7196 lol