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W211 OM642 Limp mode, Turbo replaced

Uridium said:
So I received my old Turbo Actuator back today, fitted it and all looked good apart from a flat battery! got the car jump started and no limp mode, car running sweetly. Took for a decent drive to put some juice in the battery and no issues at all, fast roads, traffic etc... didn't miss a beat. Pulled onto my driveway after a faultless 20 mile drive and it dropped back into Limp mode with the P0244 wastegate error again :-( :-(. I'm gutted, I honestly thought it was fixed for a short while.

cleared errors with torque, restarted car and no limp mode although it is showing a pending P0244 again. i'm pretty confident that the actuator that came on my new Turbo did have a fault (the P0243 errors) and that fitting my old (recently refurbed) actuator has resolved that but something is still causing the P0244 error. I'm not convinced it's the Turbo or Actuator, I have a nagging feeling that something else is throwing an error and the P0244 Wastegate code and limp mode are just symptoms.

Also...Turbosurgery have told me that they have tested my old Turbo and found no fault with it so I've pretty much lost faith in MBAutomotive to fix the issue, they've already advised me seemingly needlessly to replace the turbo and are just saying they think the new turbo is faulty as well.

I hate just throwing new parts at a car in the vain hope I find the issue but I guess it might just have to be the EBPS replaced next....but if anyone else has any good ideas I'm all ears.
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So I changed the EBPS today, genuine MB part.
Still the same issue, runs fine for about 10 mins but as soon as it's nicely warmed up it throws the P0244 error and drops into limp mode.
I'm out of ideas now :-(
 
Local independent and STAR to get the live values?
 
Larkone said:
Local independent and STAR to get the live values?
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Yes already tried that, mbautomotive in Loughborough, they advised it was the turbo that was faulty, this has been replaced and issue persists. They then insisted the new turbo was also faulty (easy suggestion I feel as I supplied the part)

I'm still suspicious of my refurbed Actuator so will be speaking to essex-recons next to get them to test it, If that doesn't cure it then I think I might have to find another local MB indy.
Wish I could just buy a new Hella actuator but I'm not paying £1500 for a new Garret turbo just to get a new actuator .

If anyone can recommend a good local indy in North Leicestershire\South Derbyshire please)
 
was the old actuator the same no as new. they cant be interchanged unless matching.

A good turbo place should flash them to the VIN.

Did you check the arm was moving freely. If the vanes are full of carbon it will eat your worm gear in no time.

Turbos rarely fail but something connected to the turbo does - its easy for a poor mechanic to say - goosed turbo.

carefully check the wires for a short.
 
I doubt it is turbo actuator if it goes limp in time related only. If old one is dodgy and cause limp one and then - possible. If replacement part does the same, probably barking at wrong tree. Wrong type/wrong assembled actuator would trigger fault immediately when you try pull full power.
 
I keep coming back to the point where you fitted a secondhand EGR valve. You said it was to solve some EGR fault codes and that it did, but how soon after did this turbo fault start appearing? Not saying it’s linked, but I’m always suspicious of secondhand parts. EGR and boost actuator share the same 5v supply.

I think I’d be hooking up some fly leads on the 5v supply to the turbo actuator and seeing what happens to that voltage as you drive the car.
 
Yes, and those could share same power supply (can't remember 100% sure from memory), so if faulty acturor (EGR?) short circuits supply, ecu just shut it doen and limps car.? Just a thought...
 
mioba said:
was the old actuator the same no as new. they cant be interchanged unless matching.

A good turbo place should flash them to the VIN.

Did you check the arm was moving freely. If the vanes are full of carbon it will eat your worm gear in no time.

Turbos rarely fail but something connected to the turbo does - its easy for a poor mechanic to say - goosed turbo.

carefully check the wires for a short.
Click to expand...
Yes the old actuator and new were both the same part number.

The new actuator that came with the turbo threw errors p0243 and p0244 almost immediately after starting, swapped this out with my old refurbed actuator and it now runs fine for maybe 15-20 mins and then drops into limp mode with the P0244 and P2510 errors
 
Jobsworth said:
I keep coming back to the point where you fitted a secondhand EGR valve. You said it was to solve some EGR fault codes and that it did, but how soon after did this turbo fault start appearing? Not saying it’s linked, but I’m always suspicious of secondhand parts. EGR and boost actuator share the same 5v supply.

I think I’d be hooking up some fly leads on the 5v supply to the turbo actuator and seeing what happens to that voltage as you drive the car.
Click to expand...

I'm not getting any EGR related codes annoyingly and an EGR isn't a cheap part to swap out :(

I guess i could try another used EGR, there are a few on ebay

I'm tempted to find a different MB Indy to see what they diagnose
 
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I done what everyone said you shouldn't do and bought a brand new aftermarket Turbo Actuator, specifically one of those chinese ones from Amazon.

Found one that had decent reviews, fitted it this morning, cleared CEL and went for an extended test drive for over an hour.

Car didn't miss a beat, no errors, running beautifully.


I'll send my genuine one back to Essexrecons for them to inspect and repair seeing as I now know for sure it's faulty, I'll be keeping the chinese one on the car and will keep the refurb one as a spare.

Thanks to all who have helped and advised on this journey...
 
Uridium said:
I done what everyone said you shouldn't do and bought a brand new aftermarket Turbo Actuator, specifically one of those chinese ones from Amazon.

Found one that had decent reviews, fitted it this morning, cleared CEL and went for an extended test drive for over an hour.

Car didn't miss a beat, no errors, running beautifully.


I'll send my genuine one back to Essexrecons for them to inspect and repair seeing as I now know for sure it's faulty, I'll be keeping the chinese one on the car and will keep the refurb one as a spare.

Thanks to all who have helped and advised on this journey...
Click to expand...
Go China :) .
Good job buddy
 
W1ghty said:
I was only joking buddy , us W211 owners have got to stick together ;)
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Defintely , despite the issues I've decided long ago this car is a keeper. Even when I upgrade and replace it I'll be keeping hold of the w211

BTW...also cut my spare broken batwing and fitted the turbozentrum hose mod on the batwing air intake

Screenshot 2022-12-31 162643.png
 
Last edited:
Uridium said:
Defintely , despite the issues I've decided long ago this car is a keeper. Even when I upgrade and replace it I'll be keeping hold of the w211

BTW...also cut my spare broken batwing and fitted the turbozentrum hose mod on the batwing air intake

View attachment 135416
Click to expand...
No more oil leaking onto inlet port shutoff motor well done.
 
Good to hear you have fixed the fault that was causing the limp mode to kick in.

I'm hoping for a similar outcome when I hear back from the Indy I use on the cost of replacing a reconditioned turbo and other issues that may have raised when the original turbo on the car failed 228k miles.

If the cost of the work is to much I doubt I'll put the w211 e320 back on the road. I'll make the call this week ahead.
 
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