Those plates can fall off though. I thought mine was lost when I bought the car, but found it when I pulled the driver's seat. You can also find the VIN on a plate rivited inside the driver's door and on a plate above the radiator.

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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