Haven't tried it yet. Looking at my spare instrument cluster, the only place where it could go and make a contribution would be as the "Low Fuel" indicator. The cluster has no light pipe for the little triangle indicator – the bulb sits in the back and glows (more or less) in the direction of the triangle. A reflector would help.

[Later]

I did a comparison between the reflector bulb and a regular bulb, with my wife as judge. The decision: "I think it's brighter."

[Even later]

For the 1992 300E 4-Matic (the car from which the lamp came), EPC does show a different lamp for the "Fuel Reserve Indication," 001 544 90 94 but the drawing (admittedly rather crude) does not show a reflector.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970