86 560SEL 96K

is it a bad idea to clean the rotor and distributor contacts?

i gently cleaned the end of my rotor of the black and pitted stuff and same with the distributor contacts. so i guess i might have made the gap slightly larger? what would be the results in performance?

i plan to buy new ones but thought i'd try cleaning just to see if it makes a difference... it hasn't that i can tell. car runs fine except for bit of rough idle which i've been dealing with for awhile. trying to rule out everything i can before acquiescing to my mechanic who says my fuel distributor is defective.

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R Martin
Dallas, TX (Addison)

86 560SEL, 128K