If you'll permit a slightly off topic question....I've been looking at one of these (1980 300SD, W116 chassis) where car only goes in reverse. So sounds like B2 piston. Are these simple to replace as in W126 or more difficult? Trying to figure out if it's worth taking a chance on the car....and resale is an issue, hence my joining this thread. Thanks.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 179k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 77k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife