I've got blue MB tex too. Mine had a 616 in it when I bought it, but it was no good so I swaped in the turbo engine.

Keep up the good work

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine