Here is my story and for those who has similar issues.
When my car was in hard acceleration I got a jolt, this was when my car was about 45000km, I didnt really think of it as a huge problem since which one of us are flooring it every day? now my car is 90000km, I am on my 3rd rear differential (all covered by warranty) and they finally figured out the problem was crankshaft sensor. this last repair i went in for was when my jolt was intense as ****. i was accelerating on the highway going from 90km aiming to reach 130+, almost floored the gas and i got 3 jolts that put my transmission into 7th gear and locked there (maybe a safety mode?). i was not able to change gears or any modes, nothing worked. i had to press on the gas and slide to the side. got my car towed to MB, they ran the codes and got an error ..finally.
After changing crankshaft sensor, the car is feeling new. It also fixed another problem that some ppl felt, which was that accelerating from stops/red light felt like mini launches. I think this was also the problem from sensor sending wrong information, which ultimately caused to breaking rear differential.
soo...i highly suggest to look into that sensor.. luckily my car is in extended warranty. these repairs would have costed a fortune..
2015 GLA 45 AMG
premium, premium+, amg exclusive package, amg driver's package, amg black 20" 10spoke wheels, H73 carbon fibre trim
Last edited by Michael Zhang; 08-07-2019 at 08:43 PM.