Glad you all found them (the BA-7's that is for the levers...)
When I was rebuilding my car 1999-2001, and had the heater lever assembly out, I decided to replace the lamps at that time with new. The Mercedes dealer in my town had just opened--their parts department was a large empty room, with 2 shelves in the back--with what I assumed were oil filters etc. for late model MB's. I went to "order" said lamps. Lo and behold, in this brand-new dealer that had essentially zero parts inventory,
they had the lamps on that shelf!
Even the cashier was amazed that a Mercedes part cost less than $1.00!