| Digit | Usage | VIN | Decoded |
|---|---|---|---|
| 1 - 2 | Model Code | D1 | D-100 2WD 1/2-ton |
| 3 | Body | 4 | Conventional Cab with Sweptline Box, Compact Hi Line Wagon(Royal Sportsman), MB3 High-Line |
| 4 | Gross Vehicle Weight | A | 6,000 lbs or less |
| 5 | Engine | B | L6 225-1v |
| 6 | Year | 8 | 1978 |
| 7 | Plant | S | Warren MI Truck #1 (Incl. Compacts) |
| 8 - 13 | Sequential Serial # | 145915 | 145915 |