W204 C220 CDI Auto reliability

[nrg220]

I have one of the first W204 a Sept 2007 C220CDI, it apparently has the modified W203 cdi engine to 170BHP and a 5 speed autogearbox. Ive had a few problems all fixed and its running ok now but I cant help wondering if a new light will pop up anytime.

I know some W204 later ones had injector problems but are their any early W204 CDI users with high mileage and no problems.

Reading the pages Im wondering how reliable Mercedes actually are these days longer term as wasnt the W204 supposed to be their return to the old reliability I read somewhere.?

Thanks

 

[kam05]

I too have a similar car, mines a Sport reg'd December 2007.

When I bought mine I was told to go for the cars built on/after 2007, as Merecedes reliability was much better on these cars.

All I know is that on the W204 auto, the gerbox needs a service at 4 years/37k?

 

[nrg220]

W204 gearbox

Actually MB told me that my auto box doesnt need servicing..period and there is nothing in the manual about service on this. That said I shall do it. Has yours been reliable, whats your mileage now?

C Class Cars built on or after are all W204 designated anyway, after 2007 I think they fitted the newer engines, not sure when the 7 speed auto came in

As I said although mine is a W204 it has the W203 modified engine, maybe yours has too. My service guy (Mercedes Tech) actually said these were good one to have after he looked at the numbers stamped on the engine/gearbox but he may have been being kind

 

[Troon]

That's the same engine and gearbox as in the post-facelift W211 E220 CDI.

The engine is the OM646 EVO; the injector issues you reference are from the newer OM651 sequential turbo engine which also had problems in the W212 E-Class.

In the E, MB recommended a 37.5k mile once-only ATF change, although common opinion is that the boxes will benefit from a regular change every 40k miles or so.

From the ESS for my E220:

Service 20 - Once at 37,500 miles
Change automatic transmission oil and filter
Transmission 722.6 (5-speed)
Transmission 722.9 (7-speed)

 

[kam05]

Mines done 34K now, and yeah- a number of people have said the pre-blue effciency cars have the better (reliable?) engines.

As for the auto box service, I'll be talking to my local dealer/indy regarding this.

 

[nrg220]

More info regarding Engine and gearbox for you Kam

KAM 05 I thought I still had the email as quoted from MB below, now Troon mentions an engine number I dont recognise, but my engine reference or number is 646811-30-103-103720 and autogearbox is 722640-07-044731 so I dont know if that relates to the references Troon made. The car was registered Sept 2007 so a 57 plate, not actually sure when it was made although it was a custom order with factory additions

When you next go to your dealer you can quote this although it does seem to be backed up by there being no service schedule for it in the book, nothing not even a one time change. It only needs attention if there is a leak I guess and the level goes down

MB Quote

In response to your recent email regarding the automatic transmission fluid in your Mercedes-Benz C-Class. I can advise that the C-Class with the V6 engines and 7 speed gearboxes must have the automatic transmission fluid replaced at 30,000 miles or 3 years. Also, some of the 4 cylinder petrol models with 5 speed automatic gearboxes boxes have the same maintenance schedule. However, the gearbox coupled to the 4 cylinder diesel engine in your car does not require it's oil to be replaced during scheduled maintenance.

To be honest Im not really expecting to have a problem either with the gearbox or engine, its all the peripherals attached to it , the sensors etc that are more likley to give a problem. If you have done 34K without problems then it will be fine Im sure
My car only did 5800 in the first three years which i think doesnt help, after my first year Im up to 20K and its used now every day so its the better for it I think