New to me 2003 S600 has two problems I hope are just user error.

I can't figure out how to get the rear A/C to work - no lights when I push the buttons back there.

I also see on the pass side rear a button which looks like it would control the front passenger seat to move it forward/back, but nothing happens.

My shift knob wiggles back and forth. I took off the knob and put it on again, but no difference. Is there an adjustment that I just can't see?

Advice?

 

the rear A/C should always be lit up, at least mine is.

I believe with that button, you press it and use the rear seat control switches to move the front seat.

Shift knob should not wiggle. There is no adjustment that I know of.