W211 power headrest button
 

I just bought a W211 wagon, and its missing the button for the power headrest switch on the passenger door. Normally, I'd go to the TeileKatalog and look it up, but when I click through the front door figure to see the Door Panelling breakdown, I get nothing but jibberish text. I've tried Mac and PC, and Chrome, Safari, and IE with the same results. The front and rear door figures are the only ones that do this. Does anyone have the part number for the button?

I had same issue. Old button was found alongside the seat. On mine the end post of the switch had been broken off. I had a spare left switch. I found upon disassembly that the headrest switch was screwed to the circuit board and could be transferred into the right side switch. Needed very small tools. Minor but annoying issue resolved.

The button is not sold separately you are expected to replace the module.

Just for future reference, the seat switch is in Driver's Seat, then Seat Adjustment.