07 C230 65K mi. Wont start & no fuel pressure at rail

lmayhew · 04-24-2011, 05:01 PM

can someone tell me where the fuel pump relay is located? I checked the fuse an it's ok.

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ontmiss · 04-24-2011, 05:21 PM

It's in trunk Rear SAM module

johnand · 04-24-2011, 07:10 PM

Wow, looks like another possible 07 with premature fuel pump failure

Glyn M Ruck · 04-24-2011, 08:12 PM

Strange - we are having a run on fuel pumps on the forum.

lmayhew · 04-24-2011, 08:30 PM

Yeah it seems that way.
It's minor compared to what happend a couple of weeks ago. The Torque Convertor output shaft seized in the bushing and broke off; destroying the pump, bell housing and the torque convertor. $4200.00 later...

Silver C · 04-24-2011, 09:32 PM

Quote:

Originally Posted by lmayhew

Yeah it seems that way.
It's minor compared to what happend a couple of weeks ago. The Torque Convertor output shaft seized in the bushing and broke off; destroying the pump, bell housing and the torque convertor. $4200.00 later...

Ouch man.. I hope this one is less painful..

Glyn M Ruck · 04-24-2011, 10:34 PM

Quote:

Originally Posted by lmayhew

Yeah it seems that way.
It's minor compared to what happend a couple of weeks ago. The Torque Convertor output shaft seized in the bushing and broke off; destroying the pump, bell housing and the torque convertor. $4200.00 later...

I think cpbeasley's car was heading for that!

johnand · 04-25-2011, 08:39 AM

Quote:

Originally Posted by Glyn M Ruck

I think cpbeasley's car was heading for that!

Is this a common failure Glyn? 1st I have heard of this.

Glyn M Ruck · 04-25-2011, 09:40 AM

No it's not common John. Anything that stops the pump running in these boxes is obviously trouble. If you rev the car in neutral & get a high pitched whine/howl from the bellhousing area it's time to shut things down & investigate. Little South Africa has sold 60% as many W204's as the US - mainly auto - & this is not common. My service manager is at pains to advise that if you service these 722.9 transmissions every 60,000Km & use the correct fluid they will do massive mileage. We have some very high milers in SA already that are still absolutely fine. I would say that the 1st to 2nd one way clutch failure on the 722.6 was more common & that only seems to show itself in taxi service in Europe at very high miles. The 722.9 design program was all around learning from common 722.6 failures & simplifying the transmission (other than the extra ratios) while increasing electronic control.

billbillw · 04-26-2011, 05:07 PM

Quote:

Originally Posted by Glyn M Ruck

I think cpbeasley's car was heading for that!

I thought his car was a 6MT?

LILBENZ230 · 04-26-2011, 05:33 PM

Bill - his is a 6MT.

Glyn M Ruck · 04-26-2011, 06:44 PM

Sorry - got it wrong. It was Cale commenting on another car & he was correct! I think I must be sleep deprived.

Glyn M Ruck · 04-26-2011, 08:18 PM

It was this thread that had us all guessing a Cale guessed right.

http://www.mbworld.org/forums/c-clas...ighlight=noise

johnand · 04-28-2011, 08:34 AM

Quote:

Originally Posted by lmayhew

can someone tell me where the fuel pump relay is located? I checked the fuse an it's ok.

What did you find? Relay, fuse, or pump?

Donmun · 04-28-2011, 06:37 PM

the fuel pump should be in the tank, accessable under the back seat. sometimes the pins in the connector gets lose causing the pump not to run. if you have any knowledge of electrical connectors, disconnect the pump and put direct power on the pump, if it runs you know the pump is good.

lmayhew · 04-29-2011, 02:41 PM

Johnand,

The car is my daughter's and is about 40mi from where I live. I plan on arming myself with a VOM and tools this weekend and try to get to the bottom of it. So far all I've been able to do is direct someone by phone to hold their finger on the relay while someone turns on the ignition. They claim to have felt it clicking.

lmayhew · 04-30-2011, 04:20 PM

Hi John,

I spent some time working on this today. I started by pulling the relay and found that water had somehow fallen on the top of the SAM and had some corrosion on the contacts. I cleaned up the contacts, tested the relay with 12v external source and it worked. But I only have 8.5 volts at the terminals at it wont operate the relay when plugged in.

When I jump the contacts at the socket (bypassing the relay) I do get 12V at the pump terminals, but the pump still didn't run. I also tried an external power source and still can't make the pump run.
As weird as it sounds, I think I need to replace both or find out if there is resistance at the terminals of the relay socket only supplying 8.5V.

Do you know if I have to loosen that large hose clamp around that plastic cover before spinning it out? to get the pump out?

Glyn M Ruck · 04-30-2011, 08:20 PM

See post 4 here.

http://www.mbworld.org/forums/c-clas...e-attempt.html

http://www.mbworld.org/forums/attach...se-latch-1.pdf

http://www.mbworld.org/forums/attach...-fuel-pump.pdf

johnand · 05-01-2011, 11:00 AM

Quote:

Originally Posted by lmayhew

Hi John,

I spent some time working on this today. I started by pulling the relay and found that water had somehow fallen on the top of the SAM and had some corrosion on the contacts. I cleaned up the contacts, tested the relay with 12v external source and it worked. But I only have 8.5 volts at the terminals at it wont operate the relay when plugged in.

When I jump the contacts at the socket (bypassing the relay) I do get 12V at the pump terminals, but the pump still didn't run. I also tried an external power source and still can't make the pump run.
As weird as it sounds, I think I need to replace both or find out if there is resistance at the terminals of the relay socket only supplying 8.5V.

Do you know if I have to loosen that large hose clamp around that plastic cover before spinning it out? to get the pump out?

Did you test the voltage WHILE cranking? On mine, the voltage jumped up only when cranking.

Yes, loosen the stainless clamp (8mm if I remember correctly) until you can pull it off the plastic cap. Then pull the plastic cap apart and off the tank.

lmayhew · 05-01-2011, 05:17 PM

John,
Are you talking about the voltage that energizes the relay? I didn't check it. Should'nt be 12v with the key on to energize the pump?

Larry

lmayhew · 05-01-2011, 05:55 PM

John,
Are you talking about the voltage that energizes the relay? I didn't check it. Should'nt be 12v with the key on to energize the pump?

Larry

johnand · 05-01-2011, 10:00 PM

Quote:

Originally Posted by lmayhew

John,
Are you talking about the voltage that energizes the relay? I didn't check it. Should'nt be 12v with the key on to energize the pump?

Larry

12V while cranking at the pump. In my car I had no voltage at the pump with the key on. In had to actually start cranking before I saw 12V at the pump.

lmayhew · 05-02-2011, 06:31 PM

John,

Did you use the Bosch W0133-1832061 to replace yours? or did you go OEM

johnand · 05-03-2011, 08:27 AM

Quote:

Originally Posted by lmayhew

John,

Did you use the Bosch W0133-1832061 to replace yours? or did you go OEM

OEM from parts.com $174 for the pump and $10 for the seal.

Sorry to hear, another 07 with early pump failure. Question for you, did your daughter ever run E85 in here car?

lmayhew · 05-06-2011, 11:47 PM

John,

We never ran E85 but the car had 40K when I bought it. E85 is pretty much non-existant here in so. california

04-24-2011, 05:21 PM	#2
ontmiss Senior Member Garage is empty, add now Join Date: Jan 2010 Location: Mississauga, Ont. Posts: 282 Drives: 2007 C280 4matic Avantgarde	It's in trunk Rear SAM module Attached Thumbnails Last edited by ontmiss; 04-24-2011 at 05:34 PM.

04-24-2011, 07:10 PM	#3
johnand Super Moderator 2007 Mercedes-Benz C-Class Join Date: Dec 2006 Location: Camas, WA Posts: 2,318 Drives: 2007 C230SS	Wow, looks like another possible 07 with premature fuel pump failure __________________ -- John Anderson Johnand's official thread Johnand's oil analysis thread Official Ethanol (E85) Thread

04-24-2011, 08:12 PM	#4
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,853 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	Strange - we are having a run on fuel pumps on the forum. __________________ Llandudno, Cape Town, South Africa

04-25-2011, 09:40 AM	#9
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,853 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	No it's not common John. Anything that stops the pump running in these boxes is obviously trouble. If you rev the car in neutral & get a high pitched whine/howl from the bellhousing area it's time to shut things down & investigate. Little South Africa has sold 60% as many W204's as the US - mainly auto - & this is not common. My service manager is at pains to advise that if you service these 722.9 transmissions every 60,000Km & use the correct fluid they will do massive mileage. We have some very high milers in SA already that are still absolutely fine. I would say that the 1st to 2nd one way clutch failure on the 722.6 was more common & that only seems to show itself in taxi service in Europe at very high miles. The 722.9 design program was all around learning from common 722.6 failures & simplifying the transmission (other than the extra ratios) while increasing electronic control. __________________ Llandudno, Cape Town, South Africa

04-26-2011, 06:44 PM	#12
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,853 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	Sorry - got it wrong. It was Cale commenting on another car & he was correct! I think I must be sleep deprived. __________________ Llandudno, Cape Town, South Africa

04-24-2011, 08:30 PM	#5
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	Yeah it seems that way. It's minor compared to what happend a couple of weeks ago. The Torque Convertor output shaft seized in the bushing and broke off; destroying the pump, bell housing and the torque convertor. $4200.00 later...

04-26-2011, 05:33 PM	#11
LILBENZ230 MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2008 Posts: 6,142 Drives: 2011 C300	Bill - his is a 6MT.

04-26-2011, 08:18 PM	#13
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,853 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	It was this thread that had us all guessing a Cale guessed right. http://www.mbworld.org/forums/c-clas...ighlight=noise __________________ Llandudno, Cape Town, South Africa

04-28-2011, 06:37 PM	#15
Donmun Junior Member Garage is empty, add now Join Date: Dec 2006 Location: Florida Posts: 54 Drives: 2002 C32 AMG	test for the pump the fuel pump should be in the tank, accessable under the back seat. sometimes the pins in the connector gets lose causing the pump not to run. if you have any knowledge of electrical connectors, disconnect the pump and put direct power on the pump, if it runs you know the pump is good.

04-29-2011, 02:41 PM	#16
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	Johnand, The car is my daughter's and is about 40mi from where I live. I plan on arming myself with a VOM and tools this weekend and try to get to the bottom of it. So far all I've been able to do is direct someone by phone to hold their finger on the relay while someone turns on the ignition. They claim to have felt it clicking.

04-30-2011, 04:20 PM	#17
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	Hi John, I spent some time working on this today. I started by pulling the relay and found that water had somehow fallen on the top of the SAM and had some corrosion on the contacts. I cleaned up the contacts, tested the relay with 12v external source and it worked. But I only have 8.5 volts at the terminals at it wont operate the relay when plugged in. When I jump the contacts at the socket (bypassing the relay) I do get 12V at the pump terminals, but the pump still didn't run. I also tried an external power source and still can't make the pump run. As weird as it sounds, I think I need to replace both or find out if there is resistance at the terminals of the relay socket only supplying 8.5V. Do you know if I have to loosen that large hose clamp around that plastic cover before spinning it out? to get the pump out? Last edited by lmayhew; 04-30-2011 at 04:23 PM.

04-30-2011, 08:20 PM	#18
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,853 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	See post 4 here. http://www.mbworld.org/forums/c-clas...e-attempt.html http://www.mbworld.org/forums/attach...se-latch-1.pdf http://www.mbworld.org/forums/attach...-fuel-pump.pdf __________________ Llandudno, Cape Town, South Africa Last edited by Glyn M Ruck; 04-30-2011 at 08:26 PM.

05-01-2011, 05:17 PM	#20
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	John, Are you talking about the voltage that energizes the relay? I didn't check it. Should'nt be 12v with the key on to energize the pump? Larry

05-01-2011, 05:55 PM	#21
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	John, Are you talking about the voltage that energizes the relay? I didn't check it. Should'nt be 12v with the key on to energize the pump? Larry

05-02-2011, 06:31 PM	#23
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	John, Did you use the Bosch W0133-1832061 to replace yours? or did you go OEM

05-06-2011, 11:47 PM	#25
lmayhew Newbie Garage is empty, add now Join Date: Apr 2011 Posts: 12 Drives: 2007 c230 sport	John, We never ran E85 but the car had 40K when I bought it. E85 is pretty much non-existant here in so. california

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