Interesting. Does it make any difference in brightness when installed?

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Its for brake pad worn down indicator lamp

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1987 300D Turbo 170K (sold)
1990 300E
1992 300D 2.5 Turbo
2003 Audi A6 4.2

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

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"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

I took the little reflector bulb to my dealer . . . the parts guy had never seen one like it. He looked it up (1992 300E 4-Matic) in their parts catalog; although it shows a different number for the low fuel lamp than the others, he didn't have one in stock so we could compare.

To see the difference, I photographed the cluster with a regular bulb and with the reflector bulb. Although I used two different lamps (should have moved the reflector not the lamp), they were both Osram (12V 1.2W) and both were clean and bright. The photos were taken with the camera in exactly the same position and within a couple of minutes of each other so the lighting is the same. You can definitely see a difference.

Note that this was with the key "ON" but the engine not running, so the low-fuel lamp is operating in "test" mode, which is not as bright as it would be if it really were a low fuel situation.

__________________

"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