Help Needed Locating Fuel Sending Unit (WIS would be nice)
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
See the diagram above. Check the breather line that goes all the way from the drivers side tank up to the filler neck.
Thread Starter
Junior Member
Joined: Jan 2011
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02 c230
Im going to drop in a new fuel filter. Which I'm fairly certain wont fix the problem.
Next I will look at the breather. What is the process for checking that hose? I dont see any easy access to it to blow some air through it. Is there any or easy way to gain access to the hose and filler neck? From the diagram (and the way the car is built) it looks like you need pull the whole tank out. Is that the case?
-thanks again
-mtl
Next I will look at the breather. What is the process for checking that hose? I dont see any easy access to it to blow some air through it. Is there any or easy way to gain access to the hose and filler neck? From the diagram (and the way the car is built) it looks like you need pull the whole tank out. Is that the case?
-thanks again
-mtl
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 19
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02 c230
New fuel filter didnt help. Now back to checking the breather on top of the tank. Can I get some guidance on how to get to this hose? Do you need to remove the whole tank?
-thanks again
-mtl
-thanks again
-mtl
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Only way is to drop the tank. I suspect your fuel pump.
Last edited by Glyn M Ruck; Aug 19, 2011 at 11:42 PM.
MBWorld Fanatic!
Joined: Jun 2011
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From: Cape town
not a merc
check your fuel delivery that returns to the tank, you can test it where it comes out the fuel filter just connect a loose pipe into a bottle start the car and let it idle, you should see a litre in 30-40 sec. if its way below that renew the fuel pump
Thread Starter
Junior Member
Joined: Jan 2011
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02 c230
Glynn, Thanks for the Removal WIS, I had shoulder surgery last week so wotn be attempting this for a few more. Is there a torque for the drive shaft bolts or possibly a second WIS? The single sentence "Remove rear axle" makes it seem way too easy.
Again thanks, this will be a huge help to me when I do it.
-mtl
Again thanks, this will be a huge help to me when I do it.
-mtl
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 19
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02 c230
Russell,
Great I will try that before I drop the tank. Good thing I havent put the rear seat back in yet =)
-mtl
Newbie
Joined: Feb 2012
Posts: 1
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E240 , A class and V class
hi i have a friend who has a W203 C240 ,yr 2001,the car ran totally out of fuel the other day and it showed "MULFUCTION" , he filled up , and drove for two days , "MULFUNCTION" showed up for these 2 days , third day the car wouldnt start , he replaced the fuel filter with a new one , still wont start , the mechanic tested the fuel pressure and he says its very low . Now am wondering what happened , did the fuel pump die , if so what killed it , can an empty fuel tank kill the pump and how many pumps are in the tank ? i have just read that there is two compartments in the tank , what pumps fuel from the non pump side to the pump side ?
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