Jumpy when cold C220 CDI AUTO 2005

[pgdoh]

Hi there

This is my first post on the forum , i am currently having issues with my C220 CDI Avangarde Automatic. The car when cold is jumpy until it reaches temperature and then runs fine. I have had the car with a Merc Specialist and he put the car on Star Diagnostics found nothing .
The work carried out on the car so far has been , the dpf re-generated , gear box oil and filter change and lastly the fuel regulator changed. This has made no difference and frustration is setting in. Any ideas out there ?

Rgds PGDOH

 

[television]

These cars do hang on to the lower gears to warm up the CAT as soon as possible, this can give a few hard changes when cold, but after a short distance the box should be very smooth

 

[st4]

Both my 220cdis felt ever so lightly lumpy when cold. A feature of the engine I guess.

 

[pgdoh]

Thanks for your response , issue with the car is too jumpy for it to just be a feature of the auto engine. I have also noticed the the mpg takes quite a dip when the car is jumpy also .

 

[rf065]

Thanks for your response , issue with the car is too jumpy for it to just be a feature of the auto engine. I have also noticed the the mpg takes quite a dip when the car is jumpy also .

The MPG takes quite a dip when the engine is cold anyway, I don't think being jumpy is the cause of that.

Russ

 

[pgdoh]

MERC C220 CDI GOING INTO LIMP MODE

Had issue with my merc as it was jumpy through the gear , car has had everything done to it the dpf regenerated , new cat , turbo reconditioned. Now the mechanic finds that the car keeps going into limp home mode. Where to now ????????????????

 

[drdre78]

hi could be torque convert.used to have good test on star but think they took it out

 

[Zimbo]

Welcome pgdoh.

Have a look at this thread - it may be a split in the intercooler pipes.
http://forums.mercedesclub.org.uk/showthread.php?t=56639&highlight=Jerky+acceleration

Is it the gear change which is lumpy or the acceleration? Do the revs seem to be unstable even if you hold the pedal in one place?

Have you tried accelerating until you hit the kick-down button recently? When I had this problem the car went into "limp" mode if I floored the accelerator. It would go into limp mode but would reset itself after a few start/stop cycles (not sure how many but by the next day it was usually reset).

 

[pgdoh]

2005 MERC C220 CDI AUTO

Based on my previous post's i have no success with the car , got it back from the mechanic. The cat , dpf and turbo has been worked on . The car no longer goes into limp mode but the rev's are still unstable and the car seems to be jumpy , unfortunately no success . I have relayed all the ideas from the forum users back to the mechanic and he has checked without success.

 

[Rotorhead500]

Have you checked transmission fluids (level & condition) and filters?

Mine was 'thunking' a bit in lower gears, especially when cold - changed all fluids & filters not long after I bought the car and saw a vast improvement.

 

[pgdoh]

Thanks for the feedback , during the last service the auto gearbox oil and filters were changed. I am at a loss as to what the problem is.

 

[Silver_Star]

I'm struggling to understand what the problem is here - Is it the engine that is jumpy or the gear changes?

 

[Steve@Avantgarde]

I have got one here at the moment. This one has a DPF. The temperature sensors on the DPF are coming up as faulty so i am going to replace these first. If not I am going to look at the lock up solenoid on the electro plate next.