I think you need to install the bulb wearing cloth gloves, since oil from your hands can cause the bulb go fffft! long before its time.
Semibodacious Transmogrifications a Specialty
1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)
"Time flies like and arrow, yet fruit flies like a banana"