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E-Class (W211) 2003-2009

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Old 11-08-2005, 04:51 AM   #1
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E320 CDI Power Loss and Limp Home Mode

This is info from another website that could be useful:
"I have a 2005 CDI just 1 year old, 21K miles on it. I've had similar issues. After about 6 months the car would accasionally cough and stall, or cough then run.......coasting off a highway ramp, asked for power, got none. Acceleration was limited and engine noise was distinctly louder...... MB found that stopping and restarting it restored power. They told me this was the computer putting the car in the Limp Home Mode. This code occurs when the computer thinks that continued use might damage the engine, so it restricts output to half throttle and transmission to lower gears.

AFTER THE EGR VALVE WAS REPLACED, CAR IS BACK TO DELIGHTFUL SELF....."

It looks like they are having some EGR problems. I am putting a note in my Operating Manual regarding the loss of power problem.
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Old 11-08-2005, 08:09 AM   #2
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Quote:
Originally Posted by jimbo1mcm

AFTER THE EGR VALVE WAS REPLACED, CAR IS BACK TO DELIGHTFUL SELF....."

It looks like they are having some EGR problems. I am putting a note in my Operating Manual regarding the loss of power problem.

seems to be a common problem, this happened to me and it was the same problem
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Old 11-08-2005, 02:29 PM   #3
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holy smokes, that sounds exactly what i've been experiencing with the sputtering and hesitation. Sorry for the basic question but what exactly is an EGR valve?
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Old 11-08-2005, 02:42 PM   #4
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Originally Posted by kort677
seems to be a common problem, this happened to me and it was the same problem
Kort have you had any issues after this? Did the CEL come on? Did they also take a look at the transmission. Just trying cover all of the possible diagnoses. Ontop of the diesel smell and leaks which have now been fixed, the ongoing hesitation continues especially after driving at highway speeds and taking my footy off the gas pedal (ie. exiting the ramp) the car begins to hesitate and feels as though if i don't give it some throttle it will stall. Frustrating but after all of this, i still love the CDI. Go figure
Jay
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Old 11-09-2005, 07:00 AM   #5
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Quote:
Originally Posted by saffrontiger
Kort have you had any issues after this? Did the CEL come on? Did they also take a look at the transmission. Just trying cover all of the possible diagnoses. Ontop of the diesel smell and leaks which have now been fixed, the ongoing hesitation continues especially after driving at highway speeds and taking my footy off the gas pedal (ie. exiting the ramp) the car begins to hesitate and feels as though if i don't give it some throttle it will stall. Frustrating but after all of this, i still love the CDI. Go figure
Jay
Nothing came on, the car just went into limp mode, took it to the dealer and they replaced the egr valve, no problems since then and that was 30k miles ago
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Old 11-09-2005, 09:38 AM   #6
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Quote:
Originally Posted by saffrontiger
holy smokes, that sounds exactly what i've been experiencing with the sputtering and hesitation. Sorry for the basic question but what exactly is an EGR valve?
Exhaust gas recirculation valve.... does exactly what it says, and keeps the engine warmer inside, and aids combustion.
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Old 11-09-2005, 11:37 AM   #7
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Quote:
Originally Posted by CE750
Exhaust gas recirculation valve.... does exactly what it says, and keeps the engine warmer inside, and aids combustion.
It actually feeds some exhaust gas back into the intake manifold to reduce ignition temperatures and that will reduce NOX.

The valve should only open at part throttle. At idle or with a closed throttle, the valve should close to prevent exhaust gasses from getting to the intake. If the valve fails to close you can have a rough idle or similar problems. With modern engines, electronics and sensors are used rather than the old vacuum method so there could be something else besides the EGR Valve at fault.

EGR is designed for one purpose, to reduce emissions. Otherwise, it woudn't be there.
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Old 11-09-2005, 11:37 AM
 
 
 
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2005, cdi, e320, egr, gearbox, hom, home, idle, limp, mercedes, mode, replace, rough, valve, vegas, victory, w211



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