Problems after another cls 320 cdi 2005

[kendal2]

Hi there guys, first time poster ,

I bought a CLS 320 cdi 3.0 v6 diesel on 128k miles 6-7 months ago.

I had the trubo replaced due to problems with actuator (brand new from essex turbo)

Went fine for a few weeks then I started hearing whistling noises when accelerating or just reving. (sounded cool tbh) Took it back to my garage to have a look. It was a loose air pipe on the turbo. So that was sorted.

A few weeks later the car started juttering every time I accelerated hard when wet (wheel spin), it would jutter for about 5 mins or so.

Then a few weeks later the car started smoking when idle or in traffic for too long (anything over 3 mins or so). There would be a thick cloud of white smoke as a rev or move forward. It would clear out after about 1 min of reving or driving and it would be back to normal. In this state I can smell a slight burning.

These are the problems so far

I have serviced the car when it had the turbo change- changed oil. Fuel and oil and air filters.

After all these today it went into limp mode and I got an obd2 scanner to check for codes:

Red:

P1400 powertrain
p0670 powertrain

Non red:

P2078 powertrain
p2270 powertrain

I dont know what to do right now. Even if I sell it or keep it I want to make it drivable.

Any ideas?

Thanks in advance

 

[Reggie-rock]

So sorry to hear your problems with your CLS although I can't help you with your technical faults I would strongly advise you sell the car once you get it sorted to a dealer, so at least when it is resold the new owner can take it back to the garage where purchased when further problems emerge.
Hope someone on this excellent forum can help you, good luck.

 

[selphy]

I'm sure that consensus on here would be to find a independent Mercedes specialist who has Star diagnostics. Don't waste time or money with generic OBD code readers - these are complex engines.

One thing that I remember reading somewhere on here is that you have to use the Star system to adapt the ECU to the new airflow after changing the air filters. I think this applies only to the 6 cylinder diesels with twin air filters. It might be something as simple as that putting the car into limp home mode.

Good luck - it will be a lovely car once it's sorted!

 

[merc85]

Poor turbo maybe?

 

[kendal2]

Update: I took it to two garages both whome I'm very close with.

First one said the error is a dpf error and the dpf needs cleaning or replacing.

So after this I got some dpf cleaner added it into the fuel. Used manual gears and kept engine in lowest gear possible at my speed. After 20 mina of 2nd gear driving at 33mph at 30000 rpm the limit came off and I wad able to rev past the 30000 rpm mark. So I went onto the motorway in 4th gear 3500 rpm at 70mph for 50 miles and the eml came off..

I guess this done a forced regeneration on the dpf.

Then I took it to my other friends garage, he scanned it and it showed up as glow plug and dpf sensor. He said it would cost around £200 to replace. He also said it should stop it from smoking.

I'm going to leave the car with him on Monday or Tuesday and see what happens from there.

The car now takes off in full power much better than when I first got thr car.

However after a 80 miles of motorway driving the car wouldn't rev past 30000 rpm again but this time not eml, so I selected low gear again after I turned of and on again, then it went back to normal..

 

[mersum1es]

it's very common that dpf shows fault after turbo failure, car not always can empty itself but you should get is star plugged, force regeneration burn, then reset ash values. Of course it could be sensors playing up, dpf pressure sensor piping should be checked they are clean, and sensor reading plausibility should be checked.

 

[MBScoob]

Doesn't white smoke usually mean oil is being burnt? When the turbo failed on my old Focus diesel, it leaked oil into the engine, leading to clouds of white smoke. If the seals on the turbo were a bit leaky, the car would be burning oil creating white smoke. This could in turn contaminate the DPF as well as any sensors in the exhausts path.

Note: MB appear to "hide" a lot of common faults from normal OBD2 diagnostic tools, so such third party tools are generally useless as you're liking missing a lot of information. You're best off going to an independent with STAR/XENTRY diagnostic equipment.

Scoob.

 

[kendal2]

Update:

I'll took it into the second garage to change the sensor but they later called me and said that it was a blocked dpf and they would charge 650 to remove dpf and re program it. I done some research online and found a place that would remove the dpf and remap the car and reprogram so it reads no dpf. As far as I could see this is the cheapest option as a remap costs around 300... So I will be taking it in on Thursday morning to see what they do. I have requested for maximum performance they said it would bring my bhp to 260-270 and it would also improve the fuel economy.

I will keep yyo gus updated to what happens next

 

[kendal2]

So I the dpf removed and remapped. The car now runs much better. The power delivery is insanely quick and powerful. My mpg is very good too, I done 43 mpg in town with moderate traffic!

So all is good but the car still produces white smoke when idling too long in traffic. It clears out once I rev it a few times but the out burst of smoke is a lot.

Any ideas to why its smoking white? I've checked water and oil and both are fine.

I'm having feelings to the turbo maybe a loose pipe? Where are the turbo pipes? I can see the one on top but thats fine....

 

[mersum1es]

It might be DPF removal not succesfull... was the company which make removal/remapping familiar with these? At the begining when ppl started to do these thing, some serious problems were rarely found, due to improper remap. It not onlu coding DPF off but there are many parameters around software where are some 'calculators' for DPF parameters, and some of them keep counting and trigger regeneration even no hardware. I thought these problems are already found out in a hard way, but it's still one possibility. Car is not in a limp mode?

Low turbo pressure usually makes black smoke, water makes white, fuel grey and oil bluish smoke (I think color chart is not according RAL here )

 

[merc85]

White smoke after tick over is usually turbo, Although its very strange you dont have coolent loss :/