Yesterday I had the snows removed and the regular tires put on....92 300D. The tech made the comment that it didn't look like the rear calipers were engaging because of rust SPOTS on the surface of both rear rotors (the spots are evenly distributed over the surface, but there's still plenty of bare metal to be seen). This is a car driven every day so I was surprised to see the spots. And on my 91 300D (same driving patterns....if anything driven less) the rotor surfaces were perfectly clean. So I'm thinking I might be needing new calipers.

As it's due for a state inspection, I set an appointment (different shop). I mentioned the brake issue and the tech that rust spots on the rear are not necessarily indicative of a problem.

What are anyone's thoughts?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife