What I was planning on doing was taking the metal sleeve that fits around the head unit and cutting off the top and a thin strip of each upper side of the sleeve so that it is |__| shaped. This will give me a little extra play for the unit to slide in. I am going to drill holes in the bottom for the plastic tabs to snap into, then attach the |__| to the head unit and slide it in until it catches on the plastic tabs. Since your tabs are gone, maybe you could cut the sleeve as above, drill 2 tiny holes in the sleeve where the tabs would normally go, and get matching size rubber grommets at the harddare store for the two holes. This should provide a slight protrusion to go into the holes where your tabs were located. Good luck.

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E