2-1 rough downshift
12-25-2020, 10:40 AM
#26
Super Member
On a 2017 I had a phenomenon in a 2017 where if i had foot off the accelerator slowing down then hit the accelerator if I had to speed up it would get rough and sometimes even start bucking like it didn't know what gear it wanted to choose. Dealer did a software update that solved the problem for me.
01-05-2021, 04:43 PM
#27
Senior Member
Thread Starter
Update 3:
Dealer says the transmission fluid was low by 1mm which fixed it. Transmission still shifts down to 1st in "C". Tech says the transmission should shift to 1st in "C". I still do not agree.
Had a hard downshift to 1st already.
Dealer says the transmission fluid was low by 1mm which fixed it. Transmission still shifts down to 1st in "C". Tech says the transmission should shift to 1st in "C". I still do not agree.
Had a hard downshift to 1st already.
01-05-2021, 05:15 PM
#28
Senior Member
Join Date: Jan 2019
Location: Palm Beach, Fl
Posts: 495
Received 194 Likes
on
136 Posts
2016 S550 sport, 2018 GLC300, M3, Zo7, 2021 Sierra Denali
Mine acts somewhat similar to yours only when in sport. Because it downshifts to first. In comfort no issues. If we had different years I may figure they changed their programming. But I also have a 2018 GLC300 2wd and just like every other Mercedes I have owned including my current S550....comfort starts in 2nd. Something isnt correct.
01-05-2021, 08:13 PM
#30
Super Member
Join Date: Apr 2020
Posts: 682
Received 90 Likes
on
76 Posts
19 GLC300 4M (lunar blue/black/black ash aluminum),17 GLE350 4M (selenite grey/ espresso/eucalyptus)
Mine acts somewhat similar to yours only when in sport. Because it downshifts to first. In comfort no issues. If we had different years I may figure they changed their programming. But I also have a 2018 GLC300 2wd and just like every other Mercedes I have owned including my current S550....comfort starts in 2nd. Something isnt correct.
01-06-2021, 01:51 PM
#31
Senior Member
Thread Starter
Update 4: The transmission simply reverted back to how it normally runs, hard downshift from 2 to 1 in "C". Unfortunately the next closest dealer is over 100 miles away.
