V6 CDI engine!!!

[Gaiex]

Hello all,

I'm on the market for an 2006-2008 CLK320cdi and before buying I'm trying to see if there is any update on the engines on 2007 or 2008?

For what I searched the engine is a OM642 3.0 V6 CDI, but also the new W212 350cdi has the OM642 but with more power, so what could be the diferences, Mercedes didn't made an changes to the engine in 3 years?

PS: anyway if any CLK320CDI owner here, what do you advise, any concerns?

Thanks for any kind of help

Regards

 

[Diesel Benz]

I thought the V6 had been there for more than 3 years. The V6 already had 173 kW on the W221 from early 2006 while the W212 "only" gives 170 kW (against the more typical 165 kW on a W211). I don't think the E350CDI engine is very different from the previous ones. The top panels are different etc. The W221 engine is a 642 also, as well as the 204.089 engine (current model with 165 kW and I believe only 510 Nm torque).

I'd suggest spending some time with EPC if you want to know which parts are different really.

 

[Gaiex]

I thought the V6 had been there for more than 3 years. The V6 already had 173 kW on the W221 from early 2006 while the W212 "only" gives 170 kW (against the more typical 165 kW on a W211). I don't think the E350CDI engine is very different from the previous ones. The top panels are different etc. The W221 engine is a 642 also, as well as the 204.089 engine (current model with 165 kW and I believe only 510 Nm torque).

I'd suggest spending some time with EPC if you want to know which parts are different really.

Thanks for your reply,

I allready looked on the EPC, the engine block is OM642 for all, but with some variations, in what I'm not sure!

The latest v6 engines are 3rd generation comon rail or allready 4th generation with 1900 or 2000 bar?

I cant find any differences

 

[C240Sport97]

The latest v6 engines are 3rd generation comon rail or allready 4th generation with 1900 or 2000 bar?

I cant find any differences

I think the new 2.2 4 cylinders (the Blue Efficiency range) are 4th generation, and the V6s are still 3rd generation.

The new E class brochure says the 4 cylinders have "ultra high pressure injectors" while the V6s have "high pressure injectors"

 

[Robbo]

Aren't the new 2.2 engines twin turbocharged too?

 

[Gaiex]

Aren't the new 2.2 engines twin turbocharged too?

What about the 7g-tronic transmission?
I've read in times that it had some software bugs and had some problems, are this bugs solved?

PS: I found that the firsts V6 320cdi had some injector seal problems, any info about this?

 

[Gaiex]

Ok, new 350cdi is a Euro5 vs Euro4 320cdi, and lower Co2 emissions on the E coupe.

No one have any idea where could be the differences?

I have searched alot in EPC but the pictures are the same, so no clue!

 

[Robbie T]

The differences you'll notice will be in the part numbers themselves, the pictures will just be generic.

In the latest cdi engines (blue efficiency) you're right in thinking they run higher pressure injectors which perform more efficiently. There's other differences too to make them Euro 5 compliant but i don't know what they are i'm afraid.

The 7-g boxes did have a few software updates as part of a service measure so all problems should be ironed out during the warranty period.

 

[Gaiex]

The differences you'll notice will be in the part numbers themselves, the pictures will just be generic.

In the latest cdi engines (blue efficiency) you're right in thinking they run higher pressure injectors which perform more efficiently. There's other differences too to make them Euro 5 compliant but i don't know what they are i'm afraid.

The 7-g boxes did have a few software updates as part of a service measure so all problems should be ironed out during the warranty period.

By part numbers you cant see much more! And diferent part numbers in EPC couldn't mean a different part, as you should know

I found some more info:

The Mercedes engineers optimized the technology at the heart of the V6 diesel engine, reducing the compression from 17.7 to 15.5 and enhancing the turbocharger with a more efficient EGR cooling zone, switchable bypass duct, ceramic glow system, modified injection nozzles and optimized air ducting.

The bigger change is the piezzo injectors, more efficient! The other parts I will check better

 

[saorbust]

Also be aware of differences in exhaust length and so forth.

I know mine pushed out 388 bhp, but some other models with the same engine do slightly more or less depending on exhaust.