If you cannot find door panels in the color you need, try getting panels in some other color and painting them. I have had good luck with SEM spray paint, at least in the "Shadow Blue" color that my two older diesels use. I don't know if SEM has a gray that will match your interior but it's worth a try. I have done two dashes and several small bits and am impressed with the color match and how well the paint sticks to the vinyl.

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