Fuel Filter Replacement
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Junior Member
Joined: May 2024
Posts: 31
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W203 C240
Fuel Filter Replacement
Replaced the fuel filter with Mahle aftermarket one and two days later makes a loud humming noise
I have ordered an OEM Genuine Mercedes filter and hopefully this one will be OK.
Is it recommended to clamp the lines ? I will definitely depressurize by making sure the car hasn't been driven for a while, open the fuel cap, and then remove the fuel pump fuse/relay then run the engine to remove excess fuel from the system,
I have ordered an OEM Genuine Mercedes filter and hopefully this one will be OK.
Is it recommended to clamp the lines ? I will definitely depressurize by making sure the car hasn't been driven for a while, open the fuel cap, and then remove the fuel pump fuse/relay then run the engine to remove excess fuel from the system,
MBWorld Fanatic!
Joined: Jun 2002
Posts: 7,276
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
That all sounds good. I replaced those wierd cheap clamps long ago, with ones that are supposedly for FI lines,
don't know if they're any different than any other hose clamp. Never an issue.
The problem some people have is they pull all the hoses off at once, and lose track of which go where.
I've replaced mine many time over the course of 258K miles.
I always do one hose at a time.
I've never heard the part about not driving for a while, but definately de-pressurize by pressing shreader valve on injector rail, but better to do as you suggested, then no fuel vapor in the engine compartment.
If you are certain you connected correct hose to correct place great, then yeah try replacing filter...otherwise you'll need to learn the function of each hose and how it fits on filter. I've never needed to.
I think most of Meyle stuff is made in China these days. So disappointing.
How many miles on your car? The magic number for MB fuel pumps seems to be around 200K miles.
Was true for our ML and my C Coupe. I bit the bullet and bought pump from Mercedes.
Could just be coindental that your pump now also needs replacement.
don't know if they're any different than any other hose clamp. Never an issue.
The problem some people have is they pull all the hoses off at once, and lose track of which go where.
I've replaced mine many time over the course of 258K miles.
I always do one hose at a time.
I've never heard the part about not driving for a while, but definately de-pressurize by pressing shreader valve on injector rail, but better to do as you suggested, then no fuel vapor in the engine compartment.
If you are certain you connected correct hose to correct place great, then yeah try replacing filter...otherwise you'll need to learn the function of each hose and how it fits on filter. I've never needed to.
I think most of Meyle stuff is made in China these days. So disappointing.
How many miles on your car? The magic number for MB fuel pumps seems to be around 200K miles.
Was true for our ML and my C Coupe. I bit the bullet and bought pump from Mercedes.
Could just be coindental that your pump now also needs replacement.
Last edited by C230 Sport Coup; Aug 24, 2024 at 03:30 AM.
MBWorld Fanatic!
Joined: Jun 2002
Posts: 7,276
Likes: 172
From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
I don't think time has much to do with it, though if it's sitting for a long time and then
driven with olld gas, could be a bunch of crud in there.
But as I said Mercedes say 60K miles (and yeah, or 5 years)
driven with olld gas, could be a bunch of crud in there.
But as I said Mercedes say 60K miles (and yeah, or 5 years)
Thread Starter
Junior Member
Joined: May 2024
Posts: 31
Likes: 1
W203 C240
Replaced the filter with genuine part, noise has gone thankfully.
Concerned I am running a bit lean though, the average MPG around town is 24mpg UK / which is about 21mpg USA )
No lights, car drives fine. Cause to be concerned ? Checked for leaks after fitting and seemed dry after tightening the pipe clamps
Concerned I am running a bit lean though, the average MPG around town is 24mpg UK / which is about 21mpg USA )
No lights, car drives fine. Cause to be concerned ? Checked for leaks after fitting and seemed dry after tightening the pipe clamps
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