You can go to NAPA or just a parts house (except pep boys) and tell them the type of bulb and get the new housings with a small length of wire on them. You are dealing with a small voltage, so you can touch the bare wire without bodily damage. You have to solder the wires on though in the right order...
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM