W209 CLK270 CDI smoky on acceleration

[Angeloj]

Hi guys, just wondered if these engines are notorious for chucking out a noticeable amount of fart on heavy acceleration and when overtaking etc? Mine has done 118k miles fully serviced and running fine, but when I look in the rear view mirror I do notice a cloud of smoke!
Any ideas?

Thanks Jono

 

[sfc501]

Hi guys, just wondered if these engines are notorious for chucking out a noticeable amount of fart on heavy acceleration and when overtaking etc? Mine has done 118k miles fully serviced and running fine, but when I look in the rear view mirror I do notice a cloud of smoke!
Any ideas?

Thanks Jono

Mine does the same and I feel embarressed by it, after all it's a Mercedes..

 

[Angeloj]

That's my exact sentiment!!!

 

[oigle]

Highly likely to be a malfunctioning EGR valve. Quite common. Why not consider doing an EGR delete? Very good mod.
Check out the post on the subject by dieselman.

 

[Angeloj]

Oh ok, what does that do?? I guess I'll have to find the link unless you know where it is??

 

[Angeloj]

Just found the post! Very interesting reading but will have to have a think first!!

 

[oigle]

Just found the post! Very interesting reading but will have to have a think first!!

Very inexpensive and well worth the effort. No one has yet found a downside.

 

[Angeloj]

My only concern would be the increased warm up time because its only 10 makes to work and it takes long enough as it is !

 

[oigle]

My only concern would be the increased warm up time because its only 10 makes to work and it takes long enough as it is !

Yes, does take longer to warm up for sure. Have to be sure to have a perfectly operating thermostat.

 

[Angeloj]

I had mine replaced in June so all is well! Just got to find a coolant leak I've developed!!

 

[David Nock]

Yes, my 2004 270 CDI CLK did exactly that even from demonstator miles (bought at 5000 miles).

Driving into sun with a hot engine and then overtaking, look in the rear view mirror and cor blimy!
Typical characteristic of the engine I was assured. It cleans itself on longer runs.

 

[oigle]

Yes, my 2004 270 CDI CLK did exactly that even from demonstator miles (bought at 5000 miles).

Driving into sun with a hot engine and then overtaking, look in the rear view mirror and cor blimy!
Typical characteristic of the engine I was assured. It cleans itself on longer runs.

Don't believe everything you are told. If you do the egr delete, the smoke is virtually a thing of the past.