I hope to purchase one of these some day too. For now the 95 E300D is as advanced as I get.

What makes you confident these engines will last a long time? Isn't the verdict still out....since they they were just recently (relatively speaking) put into service?

What kinds of prices are you seeing?

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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