I just bought a Mercedes CLA 250 with the 7-speed gearbox and also switched badly between 1, 2, 3 gears. took it to mercedes. and she told me that everything is good and perfect, which of course it is not. I searched online for solutions and also came across jf gearbox tuner. and now i finally found a video of someone testing it on the same gearbox. and give an honest opinion. I'm definitely planning to buy it now 😉 good video!!!
it’s a night and day difference trust me and i think the tranny is fine nothing wrong with it it’s just the tuning aspect of it that horrible benz did a much better job on the predecessor the gle63 tuning of the transmission
