New E63s - clunk on downshift to 3rd
Thinking big picture here.
$0.02
Without you offering more information about the throttle application during this issue, I would venture an uneducated guess and say that this might be the adaptive systems waking up and being a bit cranky. I didn't operate my car outside of "C" mode for the first 1K miles and did not boot the throttle even in the slightest during that period. Shifts were always smooth. And now, with 12K miles the shifts continue to execute quite well.
If you're doing full throttle kick downs and upshifts, then yes, there is a very noticeable difference between shifts in "C" and the other modes. I've never driven a pre-facelifted W212 E63 to know if the behavior is the same or similar.
Last edited by ace10; Dec 9, 2014 at 10:26 AM.
I had hard clunk into 3rd gear on two e550 transmissions and that turned out to be bad transmissions and valve bodies... But I worked patiently with Benz for 6 months going through all the motions
Suggest you bring it to the dealer immediately. Just doublecheck the breakin procedure to ensure it doesnt say "do not downshift" or "stay in C/S" so that you arent incriminating yourself in the way you convey the issue.
Trending Topics
The Best of Mercedes & AMG
The tech tried this over and over with my clunky e550 transmission and manually mapped the shift points and shift tolerances and never got it to shift without a clunk. Therefore they then ripped the transmission open and started replacing the valve body then the clutch packs ... Finally resolved it
Here's the tech notes:
Road test vehicle and found 5-4 shift more noticeable than other downshifts. Connect sds and run short test - no codes found. Check adaptations and all adaptations in spec however B2 was near the limit. No newer software found. Perform extended road test and perform shift adaptations. Adaptations for B2 moved out even further. open ptss case and was advised to remove trans and air test b2 (case #000043254) remove trans from vehicle. remove transfer case house and torque convertor housing. remove b2 and air test - air test was ok. remove every clutch pack and inspect for damage. all seal and clutches appear to be ok. ptss advised to replace b2. replace all b2 and reinstall trans. add 9.5qts of trans fluid. perform shift adapation and found adaptations for b2 lowered into normal range. 5-4 shift was also smooth.
Last edited by PeterUbers; Dec 13, 2014 at 11:46 AM.
Good luck and let us know the outcome
As you may know, I forced Mbusa to buyback my newly ordered 2014 e550 for exact same reasons, valve body didn't solve it nor thousands of adaptations. Then the new e550 they replaced it with did the same thing but worse!!! They let me cash out for 100% of my money not a penny loss to me
Peter, that's some experience you had with 2 buybacks. Yikes!
Happy Holidays all !
Last edited by starbrite; Apr 5, 2015 at 01:37 PM.


