phobos
Active Member
Hi everyone, recently I had the ATF fuild changed on my W221 S350CDI at my local mechanic ( trusted mechanic for over 10 years) as the car's odometer is 96k and the ATF fluid had only been changed at 40k
All parts used were genuine Mercedes and the oil on the torque converter was also been drained.
The mechanic followed the procedure as Mercedes guidelines and checked the temperature with a STAR machine ( 45C to check the oil level)
Car seems fine, shifts up and down very smoothly, except on the upshif from 4th to 5th where we have a jollt, especailly if the shift is performed at lower rpm and you remove your feet. from the accelarator so:
drive normally - in 4th gear - changed to 5th - keep feet on the accelarator - Jolt but not so noticable
drive normally - in 4th gear - changed to 5th - REMOVE feet on the accelarator- Big jolt that you can feel acrross the whole car ( even the missus notices it)
Took it back t the mechanic and we have ran through the procedure again putting brand new oil and checking the level, but still the jolt it there?
Any ideas?
All parts used were genuine Mercedes and the oil on the torque converter was also been drained.
The mechanic followed the procedure as Mercedes guidelines and checked the temperature with a STAR machine ( 45C to check the oil level)
Car seems fine, shifts up and down very smoothly, except on the upshif from 4th to 5th where we have a jollt, especailly if the shift is performed at lower rpm and you remove your feet. from the accelarator so:
drive normally - in 4th gear - changed to 5th - keep feet on the accelarator - Jolt but not so noticable
drive normally - in 4th gear - changed to 5th - REMOVE feet on the accelarator- Big jolt that you can feel acrross the whole car ( even the missus notices it)
Took it back t the mechanic and we have ran through the procedure again putting brand new oil and checking the level, but still the jolt it there?
Any ideas?