My w211 320 cdi is runnig revs up and down

Stebba

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Aug 6, 2008
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Hi sorry for my bad spelling (im from sweden)
my e 320 cdi is a 2005 and have a 204hk euro4
the car have run 120000 kilometer when i get it and when i drowe in 1200-1300 revs is starting to puls up and down not much but still puls.
This is when the car have too work not downhill.
I then chip tuned the car too 265hk 600nm and the problem is till there.
im not a expert of engine but it feels like the gearbox is not responding and dont put the tork in the road as it should do.
NO message when i try to go to mercedes work shop and read out errors.
I have change the oil in the motor every 10000kilometer and the same in the atomatic gearbox.
PLEASE help im very greatful fore any suggestions
sorry for my porr spelling
tanks
stebba:( :confused: :( :confused: :(
 

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