Rough shifting c300 2011
So I’ve had the car at two separate dealerships, two times now with the complaint my car is rough shifting between 1-2 & 2-3.
I have an XENTRY clone & I can perform the teach-in adaptations per gear & it smoothes it a lot/entirely but the bumpy shift between (1-2 & 2-3) always rears its head after some time. I was hoping the dealership would find something wrong with the software or something each time but never come back with anything, never find any faults & they always reset the adaptations without performing the re-learn, so they return the car stating to them it shifts quite nice, but its quite literally slamming through the gears until I, MYSELF adapt it again properly. Completely stumped, i’ve checked the fluid multiple times/topped it off but still not getting anywhere.
Any ideas?
*I will also add, once properly adapted/re-learn performed, this gear change issue only happens on LIGHT throttle, below 2000 rpm to be exact. If you drive aggressively it’s smooth.