Engines turned off while driving
Thread Starter
Member
Joined: Mar 2013
Posts: 225
Likes: 8
SL55 2003
Engines turned off while driving
Hi all,
I was driving my car, and suddenly it turned off, tried to turn it on again but nothing.. I can hear the engine trying to turn on but it doesn't fire up.
Removed the battery ground wire but nothing . Left it for 2 days nothing also
Never turned on after it shut down when I was driving.
No message shows up at all, used OBDii no errors, changed CPS, nothing also
The mechanic told me its the fuel pump..
What do you think guys ?
Thanks
I was driving my car, and suddenly it turned off, tried to turn it on again but nothing.. I can hear the engine trying to turn on but it doesn't fire up.
Removed the battery ground wire but nothing . Left it for 2 days nothing also
Never turned on after it shut down when I was driving.
No message shows up at all, used OBDii no errors, changed CPS, nothing also
The mechanic told me its the fuel pump..
What do you think guys ?
Thanks
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
Check for fuel pressure at the fuel rail port, attach a gauge then turn the key on, check for pressure, then crank motor and watch fuel pressure. It is possible to be the pumps but check pressure first, could be a money saver. As a side note pull the back seat and check the top of the fuel tank, been known to melt electrical terminals going to the pumps, also a need for new fuel pumps, Good Luck.
Super Member
Joined: Jun 2012
Posts: 959
Likes: 36
From: Maryland
W212 E63 AMG S Model
Lift up the back seat and take off the cap for the fuel senders... see if your harness got shorted out by getting drenched in fuel. Happened to me... but luckily when the car was parked and not moving.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 3,182
Likes: 15
From: Northern VA
W211
happened to me a few weeks ago. For some piece of mind, i went ahead and replaced DS sending unit, and PS fuel pump. It died while on the road and would continue to crank/shake but not turn over and start. Replaced CPS sensor, no luck. No fuel pressure at all at the port, could hear the buzz of the PS pump turn on, but no gas was going over from DS to PS. Once replaced both units, car started and running. Costs was $900 two pumps, $24 misc parts, and labor.
Super Member
Joined: Feb 2005
Posts: 929
Likes: 3
From: Littleton, CO
2005 E55 silver
happened to me a few weeks ago. For some piece of mind, i went ahead and replaced DS sending unit, and PS fuel pump. It died while on the road and would continue to crank/shake but not turn over and start. Replaced CPS sensor, no luck. No fuel pressure at all at the port, could hear the buzz of the PS pump turn on, but no gas was going over from DS to PS. Once replaced both units, car started and running. Costs was $900 two pumps, $24 misc parts, and labor.
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MBWorld Fanatic!
Joined: Jan 2009
Posts: 3,182
Likes: 15
From: Northern VA
W211
lucky for you, relay was good, connections didnt melt, no fuel pressure at rail, no CEL. Only thing left was replace both units. Also make sure that you have 1/4 gas in the tank so less gas in the tank to unplug the two units thats inside the tank.
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MBWorld Fanatic!
Joined: Dec 2009
Posts: 1,046
Likes: 28
From: SOCAL
2004 E55
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away. It's commonly misdiagnosed as a fuel pump issue and it's not it's a fuel pump relay issue
Super Member
Joined: Feb 2005
Posts: 929
Likes: 3
From: Littleton, CO
2005 E55 silver
$225 for a $15 relay? This fix is VERY simple. On the right side of the trunk remove the trunk liner panel. Just behind the air suspension resivor on the rear wheel arch are two relays, remove the black one, it will likely fall apart in your hand as you remove it. insert the new relay, button up the trunk and you're done. Total time 10 mins
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away
Member
Joined: Jul 2012
Posts: 199
Likes: 6
From: Shamong Nj
'06 E55
$225 for a $15 relay? This fix is VERY simple. On the right side of the trunk remove the trunk liner panel. Just behind the air suspension resivor on the rear wheel arch are two relays, remove the black one, it will likely fall apart in your hand as you remove it. insert the new relay, button up the trunk and you're done. Total time 10 mins
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away. It's commonly misdiagnosed as a fuel pump issue and it's not it's a fuel pump relay issue
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away. It's commonly misdiagnosed as a fuel pump issue and it's not it's a fuel pump relay issue
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
As stated did you check for power to the pumps, there is a need to diagnose any issue with these cars fully as it is quite expensive to just throw parts at it, for all you know it is a fuse that does not power up the relay. Throwing large money on pumps to only see this action fail is not good for the pocket book. I take it you checked previously and found no fuel pressure and did check the connectors so now take a meter and check for voltage at the pumps then work back through the power circuit, relay, fuse, that is of course you have no pressure, did you check? has the car been hit lately or rolled over, there is a switch to prevent pump action from running if these occurrences have happened.
Thread Starter
Member
Joined: Mar 2013
Posts: 225
Likes: 8
SL55 2003
Problem Fixed.
Before going to the dealership, they mechanic checked with Star diagnosis again and it showed that the part #0025421219 is defective. I guess it's the relay as mentioned above.
Changed it and the car worked
As the pump wires were melted, the mechanic recommended to change the pump too. He said if I left the current pump, the problem will happen again
Should I change the pump as a preventative maintenance?
Thanks a lot for the help guys,
Before going to the dealership, they mechanic checked with Star diagnosis again and it showed that the part #0025421219 is defective. I guess it's the relay as mentioned above.
Changed it and the car worked
As the pump wires were melted, the mechanic recommended to change the pump too. He said if I left the current pump, the problem will happen again
Should I change the pump as a preventative maintenance?
Thanks a lot for the help guys,
MBWorld Fanatic!
Joined: Jan 2009
Posts: 3,182
Likes: 15
From: Northern VA
W211
At this point I would replace both pumps for piece of mind. You don't want to be stuck on the road and have to tow the car to the shop and get fixed. Yes it's pricey for both pumps, seals and labor. But hopefully will last another five or so years.
Thread Starter
Member
Joined: Mar 2013
Posts: 225
Likes: 8
SL55 2003
Thanks a lot for the help
Super Member
Joined: Mar 2013
Posts: 602
Likes: 3
From: America
04 E55 AMG
I think that that the recommended interval to change the fuel filter is at 60,000 miles .....I had both done at 56,000 as preventive maintenance and didn't want to do double labor
. A strong and clean fuel system is key on these cars, especially if modified and/or driven hard or at WOT frequently for extended periods of time. Good luck
Last edited by MAN55LE; Mar 3, 2014 at 09:06 PM.
MBWorld Fanatic!
Joined: Jun 2013
Posts: 1,814
Likes: 152
From: 'Merica
'04 E55 (Gone but not forgotten), '13 C63 P31 (RIP), another '13 C63 PP
I think that that the recommended interval to change the fuel filter is at 60,000 miles .....I just did both at 56,000 as preventive maintenance and didn't want to do double labor. A strong and clean fuel system is key on these cars, especially if modified and/or driven hard or at WOT frequently for extended periods of time. Good luck
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
Problem Fixed.
Before going to the dealership, they mechanic checked with Star diagnosis again and it showed that the part #0025421219 is defective. I guess it's the relay as mentioned above.
Changed it and the car worked
As the pump wires were melted, the mechanic recommended to change the pump too. He said if I left the current pump, the problem will happen again
Should I change the pump as a preventative maintenance?
Thanks a lot for the help guys,
Before going to the dealership, they mechanic checked with Star diagnosis again and it showed that the part #0025421219 is defective. I guess it's the relay as mentioned above.
Changed it and the car worked
As the pump wires were melted, the mechanic recommended to change the pump too. He said if I left the current pump, the problem will happen again
Should I change the pump as a preventative maintenance?
Thanks a lot for the help guys,
Junior Member
Joined: Jun 2021
Posts: 24
Likes: 0
e63 amg
$225 for a $15 relay? This fix is VERY simple. On the right side of the trunk remove the trunk liner panel. Just behind the air suspension resivor on the rear wheel arch are two relays, remove the black one, it will likely fall apart in your hand as you remove it. insert the new relay, button up the trunk and you're done. Total time 10 mins
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away. It's commonly misdiagnosed as a fuel pump issue and it's not it's a fuel pump relay issue
I did the CPS and the cam sensor and I still got the random shutdowns, when I replaced the relay the issue went away. It's commonly misdiagnosed as a fuel pump issue and it's not it's a fuel pump relay issue
