Is my C220 a nail!

[samarkh]

I have a 2012 C220 manual diesel estate that I'm starting to hate.

If I change down to overtake a bit too quickly, the car starts to vibrate badly, the first time it happened I thought the road was rough. Even sat on the side of the road the car still shakes badly.
If I drive very carefully, keeping below 2000 rpm it eventually settles down ok, with no vibration.

I have just changed the injectors and filter thinking they were the cause.

Any ideas?

Could it be the engine mounts?



My problem started when I discovered the previous owner had done a DPF delete, and so it wouldn't pass the MOT. It took 10 weeks for Mercedes to find one for me.
Whilst it was off the road I cleaned the soot from the intake and EGR. Not an easy task on these engines. reassembled using new genuine Mercedes parts all the way.
Once I got a fresh MOT it seemed to run fine except for an annoying OBD code P200A75. This means 'The charge movement flap (cylinder bank 1) has a malfunction. The emergency position was not reached', that won't clear. My main dealer has no idea as to why this is happening.




New fuel filter, air filter, oil filter, replace oil, and coolant, new water pump, new injectors, new DPF, all since August.


Yours Simon M.

 

[Gazwould]

How did you discover the delete and how so didn't / wouldn't pass mot ?

 

[samarkh]

It failed the emissions test big time and visible smoke/soot when reved. On this version the DPF & Cat are separate, The DPF was completely empty, just a fat hollow tube.

 

[Gazwould]

Fueling mapped too rich .

 

[LostKiwi]

'The charge movement flap (cylinder bank 1) has a malfunction. The emergency position was not reached',
Is that not swirl flaps?

 

[samarkh]

I think so. I'm just quoting what the STAR readout says. My local main dealer gave me a full readout. (See attached)

 

[samarkh]

The first time this happened after a couple of miles the car went into limp mode and wouldn't go above 3000 rpm. The fault still was there some 3 hours later when I had left the car to cool down. Since it wasn't too noticeable below 2000 rpm I was able to drive the 60 miles home on the motorway OK, and by the time I had got home, the fault had gone. I stayed away until I had a long drive on the motorway again. This time I needed to brake sharply when a lorry pulled out to avoid another slow lorry. Changed down to accelerate in tho the next lane and the serious vibration came back. It is much more noticeable at higher RPM. Again after several miles of very gentle driving (no mre than 2000rpm) the fault cleared.

 

[mioba]

Falling out of love with a car is more often than not a result
of constant misdiagnosis and throwing good money after bad and replacing parts till something works. It is not the cars fault, it is the incompetence of the garage or the owners.
We have all done it.
Aquinating yourself with a competent indy saves you a hell loads of time, effort and money.
Most of the items you have changed already are maintence items anyhow.

Its not like MB just to provide a xentry report and not tell you the problem and cost to correct. What did they day.

 

[00slk]

Falling out of love with a car is more often than not a result
of constant misdiagnosis and throwing good money after bad and replacing parts till something works. It is not the cars fault, it is the incompetence of the garage or the owners.
We have all done it.
Aquinating yourself with a competent indy saves you a hell loads of time, effort and money........................................

Been there done that too mioba all too often and the 55 and Money Pit are no exceptions.

 

[00slk]

The first time this happened after a couple of miles the car went into limp mode and wouldn't go above 3000 rpm. The fault still was there some 3 hours later when I had left the car to cool down. Since it wasn't too noticeable below 2000 rpm I was able to drive the 60 miles home on the motorway OK, and by the time I had got home, the fault had gone. I stayed away until I had a long drive on the motorway again. This time I needed to brake sharply when a lorry pulled out to avoid another slow lorry. Changed down to accelerate in tho the next lane and the serious vibration came back. It is much more noticeable at higher RPM. Again after several miles of very gentle driving (no mre than 2000rpm) the fault cleared.

If we knew which area you are in a good Indy can be the best recommendation samarkh

 

[samarkh]

Full disclosure.
Because they had messed me around so much with the DPF (10 weeks of no car, and £800.00 of my money), they offered if I had my MOT there then they would give a guarantee on MOT bits for 12 months and give the car a once over and software update.
Driving away from there the car went into limp mode. It didn't cause me any problems other than being limited to 3000rpm.
I returned the car to them a couple of days later, by then it had cleared itself. Hence the full printout.

This current fault only happens after steady motorway runs of over an hour.

The P200A75 fault in the printout says 'Another 40 warm-up phases until fault code erased'.

Gloucester, Gloucestershire

Yours Simon M.

P.S.
I have an iCarsoft MB v3.0

 

[bigasotonuk]

Hi,
You say the previous owner had gutted the DPF which means that the ECU was remapped, have you had the ECU reflashed?
Additionally did you code the new injectors?

 

[samarkh]

Hi Andy
My iCarsoft MB v3.0 has a problem coding the 4th cylinder, might put one of the old ones in for now.

As to the remap, no I haven't, I'm toying with the idea of sticking the deleted DPF back in. This is why I'm asking you guys to see if you see if I've missed anything first.


Yours Simon M

 

[mioba]

putting the deleted dpf puts you in full circle.

Get the ECU flashed.
The injector coded

and take it from there.


A quick google shows Robin Lamb but they have either v good scores or the few v bad which could indicate for somw jobs he just isnt bothered. But its a start and follow your instinct.
Sure someone will offer alternatives

 

[M80]

The vibration would be dual mass flywheel at a 'guess'.

 

[M80]

If the inlet manifold is gummed up it will be restricting the movement of the flaps.
I don't envy you removing that.

As a contradiction though, we are assuming that the DPF was gutted, for whatever reason, but often due to regen / DPF issues.
It could be that was due to injectors but could be many other reasons also. If that issue remans it wants resolving.
But the assumption is the ECU has been remapped to overcome the DPF removal as the ECU couldn't handle not seeing it.
Often this might accompany a stage 1 power remap, no worry there,
but also it may have had an EGR delete.
The contradiction is that an EGR delete should save the gumming up of the inlet flaps.

Your iCarsoft should be able to monitor for EGR activity. See if the iCarsoft can still see it and if it is moving. They often record as 5% closed when it should be zero, ignore that bit. But you should see it opening toward 70%+ often enough.

 

[Gazwould]

The horror .

 

[samarkh]

I did all that whilst I waited for the DPF to arrive. I think it's the re-map that's the problem, or at least I hope it is as should be the easiest to prove.

 

[samarkh]

I'll investigate the EGR activity, thanks for the tip. I have also thought it could be the flywheel, I'm in denial about that one though.

 

[Taffy7hfa]

Deleting the DPF was definitely a bad idea, no idea why anyone would even bother, especially now that MOTs are getting tougher on emissions, well done for trying to rectify it though, I would have ebayed it by now.
Good luck.