trustz

03 W220 with dynamic seat, yesterday one the way home, the dynamic seat did not work ! Feel nothing when I turn left or right ! When I got home, check the dynamic lights on the control panel under the seat was on, and also try to adjust the side bolster, lumbar region support, shouder region support on the control panel under the seat, none of them work !! But I can adjust the seat forwark and backward by using the seat control on the door panel. Anyone know where to check first ?? Anyone have the same problem before. !! Thanks in advance.

whoover

It's almost certainly a hydraulic problem. The most likely cause is the pump (in the trunk), but it could also be an air line, valve or check valve. You should deactivate the dynamic feature until you get it fixed. On mine a $1 check valve failed which took out the pump by the time I brought the car in. Luckily for me, it was all on warranty.

brennanhill2003

I am having this exact same problem !!!! Well put trust!! I'm going to take everything apart when j can vet home and take a look at the hydraulic pump and airline...

Jerry-

My dynamic seats work but I had to learn two things:

The passenger dynamic seat is not broken if the light does not come on when the dyn-button is pressed. It only works if someone is sitting in the chair

The dynamic seat setting (at least for the drivers seat) is stored in the seat settings buttons on the door. When I cannot enable the dynamnic seat then I just press my nbr 1 button, which puts the seat in the right position and switches the dyn seat on.