7G-tronic problem - Help

[todorpavlov_]

Hi

Help, I recently bought Mercedes E class 280 CDI, 2006, 160 000 km on the clock. I love the car, but I'm having problems with the 7G - tronic gearbox

Here is the problem

Changing gears up - Upshift

Sometimes the car has uncomfortable up-shifting (jerk, push) when the car changes from 1st to 2nd; 2nd to 3rd; and 3rd to 4th. This does not happen always but approximately in 50% of the gear changes. Changing gears forward from 4th to 5th; 5th to 6th; 6th to 7th is very smooth. The engine running temperature does not influence the gears change.

Changing gears down - Downshift

When changing gears from 2nd to1st (e.g the car is going to a complete stop), with the engine and the gear box not warn enough (e.g. morning cold start) it jerks, pushes a little bit stronger. After engine reaches the nominal working temperature of 90 C there isn’t any more uncomfortable downshifting 2nd to 1st gear changes, however the uncomfortable up-shifting (jerk, push) is there.

I have been trying to solve that for more than a month without any luck. A couple of times I went to Mercedes Benz Dealer and they did the following, but still no improvement:

• <LI class=MsoNormal style="mso-list: l0 level1 lfo3">Changed the gearbox oil and the filter. <LI class=MsoNormal style="mso-list: l0 level1 lfo3">Updated the latest version of the software of the gear box. <LI class=MsoNormal style="mso-list: l0 level1 lfo3">Erased the adaptations of the gearbox
  • Cleared the gearbox adaptations and let the gearbox to build its own adaptation values;
  • Tried to readapt gearbox by using Mercedes Star Diagnosis;

Would you please advice what should be done next and what could be causing that uncomfortable shift?


Thanks you in advance for your support and cooperation.