which of these two is the correct fuel hose

Arzaam

Senior Member
Joined
Oct 13, 2014
Messages
651
Reaction score
47
Age
24
Location
Pakistan
Your Mercedes
W203 2002 c180
My w203 was leaking fuel from the hoses attached in the picture, I went to my Indy and he didn't have MB fuel hoses in stock but had BMW fuel hoses of the right diameter and all was well, when I discussed it with my dealer he looked at the hoses changed and said no don't use these and sold me their own fuel hoses though not from EPC as it only shows the whole fuel line not that small piece. they said any other fuel hose will detoriate and clog and whole system, which hose would be used.

27337372_1543876709052701_1998623150473123781_n.jpg

this left one claimed by my Indy to be the BMW fuel hose (can't verify) but it does look like what the car already had before

27073284_1543877622385943_6946384223063669395_n.jpg

the hose sold by MB dealer which has a thinner exterior and different texture, checking online I don't see this hose as fuel hose anywhere on w203s, only on pre 1980 Mercs w123 and old SLs.

27336750_1543877372385968_4851252256274219226_n.jpg 27544989_1543877492385956_2389476293911764875_n.jpg





both hoses side by side left one is BMW one which one would you use? 27336379_1543878072385898_4984410991105862437_n.jpg
 

John Laidlaw

Senior Member
Joined
Nov 15, 2013
Messages
26,377
Reaction score
9,034
Location
Wirral
Your Mercedes
BMW 530d X Drive Tourer M Sports
The hose with the longitudinal ribs has marking on it to suggest that it’s made primarily of Viton(r)
Viton is perfectly fine for fuels, and is particularly effective for bio fuels such as bio diesel and bio ethanol- whereas the traditional NBR hoses (nitrile butadiene) have had issues with the estrerfication process of the ‘veg’ oils used to make bio diesel.
Cutting a long story short unless it’s incorrectly marked, that hose will do the job nicely- it’s marked FPM
 
OP
Arzaam

Arzaam

Senior Member
Joined
Oct 13, 2014
Messages
651
Reaction score
47
Age
24
Location
Pakistan
Your Mercedes
W203 2002 c180
  • Thread Starter
  • Thread starter
  • #3
got it although mine is a petrol but I am better of using the marked hose rather than a unmarked one correct?
 

John Laidlaw

Senior Member
Joined
Nov 15, 2013
Messages
26,377
Reaction score
9,034
Location
Wirral
Your Mercedes
BMW 530d X Drive Tourer M Sports
got it although mine is a petrol but I am better of using the marked hose rather than a unmarked one correct?
I would say so- the unmarked one is of dubious origin potentially and unless you have the rubber laboratory tested there is no clear way of telling what it is!
 
OP
Arzaam

Arzaam

Senior Member
Joined
Oct 13, 2014
Messages
651
Reaction score
47
Age
24
Location
Pakistan
Your Mercedes
W203 2002 c180
  • Thread Starter
  • Thread starter
  • #5
thanks so much that clears it, also one more question, last time I changed the hose and also did the fuel filter when I restarted the car after the job I forgot to leave the key in the on position to build up fuel pressure, eventually it cranked and started though for the first 15 seconds it idled very rough like it had a misfire then on restarting it was back to normal again, no check engine light ever came on, I scanned it later and it showed cylinder one misfire stored code that was probably due to insufficent fuel pressure after the fuel filter change right? afterwards it has been perfectly smooth and powerful. I never had a misfire code on any other car after a fuel filter change then again I did leave the key on for few seconds on those.
 

lasa

Senior Member
Joined
Jan 16, 2018
Messages
82
Reaction score
48
Your Mercedes
E Class estate E212/ 2012/E220
The hose with the longitudinal ribs has marking on it to suggest that it’s made primarily of Viton(r)
Viton is perfectly fine for fuels, and is particularly effective for bio fuels such as bio diesel and bio ethanol- whereas the traditional NBR hoses (nitrile butadiene) have had issues with the estrerfication process of the ‘veg’ oils used to make bio diesel.
Cutting a long story short unless it’s incorrectly marked, that hose will do the job nicely- it’s marked FPM

Now, that is an answer that I would trust, :cool:.

He is a hose expert after all :).
 


ALL MBO Club members qualify for 15% discount on second hand parts.Please see MBO Members’ Area for discount codewww.dronsfields.com
Top Bottom