Intermittant Fault, causing car to go to limp mode. E320 CDI.

[Paul Simpson]

I have an E320CDI Avantgarde Estate after I bought it it would accelerate up through 2 or three gears then drop down a gear and refuse to accelerate above about 2000 revs and hold the gear. I would pull over turn the engine off and restart and the car would then behave itself till the next time it happened.
i took it into my local garage and they changed a couple of sensors which seemed to cure it for a while but after a couple of months the poblem came back but more regularly.
On a reccomendation I took the car to a Local Taxi Firm who ran Mercedes only and had their own Garage, they diagnosed a fault with the Turbo actuator and fitted a replacement unit and changed another sensor.
The car has run perfectly for about 6 months but over the last 2 months it has done it again about 3 times, again if I restart the car it sorts itself out.
I am going to take it back to the Garage but wondered if any one else had a similar problem?

Paul

 

[Larkone]

As always it is nearly impossible to guess what the problem is without first reading the codes or live data. Put the year against your car as well as that helps.

 

[Paul Simpson]

As always it is nearly impossible to guess what the problem is without first reading the codes or live data. Put the year against your car as well as that helps.

Thanks Larkone, I think sometimes it is difficult to work out the fault with the codes.
The car is a 2007.

 

[Larkone]

The codes are a better starting method than just throwing parts at it unless you have deep pockets.

 

[Wighty]

Thanks Larkone, I think sometimes it is difficult to work out the fault with the codes.
The car is a 2007.

You have 2 choices really , either buy an icarsoft MB2 code reader which is MB specific , you may get a second hand one at around £100 . Or go to an MB Indy and have the car put on MB Star diagnostics .
My MB2 has paid for itself numerous times in the 2 years I've had it .

 

[Paul Simpson]

The codes are a better starting method than just throwing parts at it unless you have deep pockets.

Of course you are right, it's just that the car has been on diagnostics about 6 times now and each time something has come up and a part replaced and problem persists. I don't have deep pockets.

 

[Paul Simpson]

You have 2 choices really , either buy an icarsoft MB2 code reader which is MB specific , you may get a second hand one at around £100 . Or go to an MB Indy and have the car put on MB Star diagnostics .
My MB2 has paid for itself numerous times in the 2 years I've had it .

I think a visit to MB Indy is in order, I don't trust myself with a code reader lol.

 

[Wighty]

I think a visit to MB Indy is in order, I don't trust myself with a code reader lol.

Very true buddy , the code reader is more of a help if you are going to do some of the work yourself

 

[ajlsl600]

get it on star, get mb codes go from there . you have already thrown cash at it. yr n the quicksand wid one hand on the bank at the moment.... . i am thinking intermittent speed sensor fault / oil in wiring ? .but, i DONT claim to be the best expert . no doubt someone will be along. wait a bit

 

[Cooper645]

Mine is currently suffering a lack of power, does yours suffer lower boost higher up the revs? Mine has splits in the hose that runs up from the inter cooler, front passenger side corner of engine. with the split pipe the car seems ok up to 40 then slightly sluggish to 70, and struggles for a 3 litre past 70.


Hoping replacement pipe should be the end of my troubles.


Also had some bogging air filters.

When was the last time you saw clean ones go in?

All well and good a garage saying they did, but in my case I got a garage to do engine oil and filter. When I came to next do it, I found they had used the wrong filter and it was just crushed in there, needless to say I have never recommended or revisited since.

 

[markdenning]

Mines has the same problems(2008 eclass).no warning lights on dash,just sluggish and no kickdown..fine when in manual,goes as normal..but in auto(Cmode).plugged the car in showed up fault code y22/1 turbo boost regulator.cleared the fault to it out worked great for abt 1minute then back to sluggish..been told i cant buy the regulator separate have to buy the whole turbois this right.I’ve only had the car since june..


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[Rob76]

Mines has the same problems(2008 eclass).no warning lights on dash,just sluggish and no kickdown..fine when in manual,goes as normal..but in auto(Cmode).plugged the car in showed up fault code y22/1 turbo boost regulator.cleared the fault to it out worked great for abt 1minute then back to sluggish..been told i cant buy the regulator separate have to buy the whole turbois this right.I’ve only had the car since june..


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The turbo actuator can be sent off for refurbishing though for a lot less - Try ACTronics