These particular lamps have a funny story for me.
When my car was in restoration, I was assisting the restorer, and often taking back assemblies and sub assemblies for my own work or outsource. So, for example, I took back a box of nasty old brake calipers and had them locally rebuilt at $40 each (this was 1999!!) and delivered the restorer fully restored brakes and all the requisite hoses to go along.
I also worked on the heater levers, cleaning them up, and sourcing new levers, and reassembling. I changed all the lamps. I took one of the old ones to the brand-new local MB dealer; so new, they had ONE SHELF in the parts department with just a few items on it. The parts guy looked at the bulbs, looked them up in the EPC, went to this barren shelf and found them! More curiously than them having them--in stock--was they were less than USD $1.00 each.
Xhafer Orhan, this was at the then new MB of Novi, MI.