W212 gearbox harsh downshift 2-1 (722.646)
Thread Starter
Newbie
Joined: Jan 2021
Posts: 2
Likes: 0
From: Croatia
E-class W212 250cdi
W212 gearbox harsh downshift 2-1 (722.646)
Hello, I own a W212 E class 250cdi 2009 with 5 speed 722.646 gearbox the oil was changed 1.5 year ago also oil level is slightly above max on 80c... It had small issue during winter were it would jolt in 1-2 gear in steady rpm. I tried adaptation using diagnostic but only for TCC solenoid and it fixed the issue there are no more jolts.
But last few weeks or more I would say sometimes there is a hard jerk when braking when coming to the stop when shifting to 1st gear, but if I brake slowly there is no jerk. Or if I manually downshift it's normal.
Should I reset the shift adaptations and go form there or?
The thing that is strange to me is the picture I took from my diag. tool, ive checked the wear and filling times the only thing that is In positive is K2 clutch for 2-3 shift and it's 4/12 but there is no jerk in 2-3...
Other thing strange is some actual values are 700 lol I know the minus is good but why so much?
pic below.
Thank you for any help.
But last few weeks or more I would say sometimes there is a hard jerk when braking when coming to the stop when shifting to 1st gear, but if I brake slowly there is no jerk. Or if I manually downshift it's normal.
Should I reset the shift adaptations and go form there or?
The thing that is strange to me is the picture I took from my diag. tool, ive checked the wear and filling times the only thing that is In positive is K2 clutch for 2-3 shift and it's 4/12 but there is no jerk in 2-3...
Other thing strange is some actual values are 700 lol I know the minus is good but why so much?
pic below.
Thank you for any help.
Last edited by Matej123; Mar 21, 2023 at 11:45 AM.
