On my 87 300E, fuse #16 is the right hi beam and hi beam indicator. It should be labelled inside the lid of the fuse box, unless they stopped doing that on newer models. Maybe also in the owners manual?

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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