I have a 2015 GLK 350 and have been experiencing the following problems with the driver's seat:

1. When bringing the vehicle to abrupt stops, the backrest of the seat moves forward coming into the stop and then moves back when the vehicle stops.

2. When going over bumps, the bottom and back of the seat move up and down.

Oddly, when I am not sitting in the seat and I try to move the seat back and forth or up and down, I can't.

Has anyone else experienced these issues? Is this normal functionality of the seat?

Of course, when I brought it to MB service, they said they could not "replicate" the issue. Par for the course, I guess......seems like if something can't be diagnosed with a computer, they can't fix anything anymore.

Thanks!