Dang, knew I should have started this project sooner!
I have electronic headrest failures in both front seats of my E420 as well.
I believe it was you G-Benz, who posted the very-good article on this awhile back. I was planning on taking digital pics of the process, and coupled with your excellent commentaty, create a DIY article for the site. This seems like a pretty common failure.
Alas, too many other projects going on to tackle this one! I'm still going to do this and use other members comments/suggestions (with due credit given of course), so let us know how it goes DavidB29!
Regards,
- Ryan