When I looked at my Hella 300E and 500E lights, it seemed that the 300E fog reflector was slightly different in shape than the 500E driving light reflector. The Hella part numbers were different on each of the 2 reflectors as well. I don't know if Hella 500E driving reflectors would fit in a Bosch light, or if the lenses attach in the same manner. My replacement 500E reflector from Mercedes was a Hella unit, so the question arises as to whether Bosch made 500E lights, or accept any of the Hella parts.

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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