E320 Headrest motor replacement

[beamer302]

Has anyone replaced a headrest motor asembly on a 2001 E320?
(Part # 210 970 00 26) I found out why my headrest wasn't working. I took the back off the drivers seat and found the motor assembly down at the bottom of the space. Looks like it is held on to the upper metal frame with plastic clips which are part of the plastic assembly. (just a guess) My motor assembly looks like these clips are broken off. Any info would be much appreciated.