With older diesel Benzes, say 1980-1995, to what extent does cruise control affect resale value? I'm trying to gauge whether it makes financial sense to rebuild cruise amps in cars I sell. With shipping, I pay James Dean $70 or so to rebuild an amp. Am I likely to get more than that when I sell the car? I like messing around with cruise systems....it amuses me....but no sense spending the money if I can't recoup it.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife