It might be original, there is no tach in the options list.

VIN WDBAB93A0BN003671
Model 300 TD TURBO
Chassis 12319312003671
Engine 617952 12 003758
Transmission 02 086923
Order 0 1 705 60535
Approx. year not defined
Lights BOSCH BOSCH
Cab 01809
Dealer United States (USA) (705)
Interior Unknown code (134)
Paint
681 manila beige (T) (с 01.01.1979 по 31.12.1981)
34 Unknown code
Options
252 radio Becker Mexico cassette, full stereo, electronic, LW/MW/SW/USW, for Saudi-Arabia only
Becker radio Grand Prix with remote control - USA (с 01.04.1974 по 31.03.1976)
Becker radio Grand Prix TR with remote control - USA (с 01.04.1964 по 30.11.1972)
radio Becker Mexico cass., full stereo, electr., L/M/S/U -Saudi-Arabia (с 01.03.1985 по 30.11.1990)
Becker radio Mexico casette, full stereo, electronic (USA version)
Becker radio Mexico cassette, full stereo, electronic - USA (с 01.08.1980 по 30.09.1983)
radio MB-Exquisit - Gulf states
radio MB-Exquisit - Gulf states (с 01.07.1992 по 01.06.1993)
411 mechanical and hydraulic sliding roof (с 01.10.1965 по 31.10.1993)
steel sliding roof (с 01.02.1963 по 30.09.1965)
440 bumpers with guards, front and rear (с 01.10.1970 по 30.04.1974)
bumper with horn and rubber buffer front and rear (с 01.03.1964 по 30.09.1970)
tempomat (cruise control) (с 01.09.1975)
467 central locking system and instruments with english lettering (с 01.04.1970 по 31.10.1993)
461 + 462 + 463 (с 01.07.1968 по 31.08.1969)
494 California version
California version (с 01.05.1973 по 31.12.1995)
version for USA/California/Canada (с 01.01.1996)
490 + 492 (с 01.12.1966 по 30.09.1967)
524 Reims adapter IV (с 01.04.1962 по 28.02.1963)
paintcoat preservation (с 01.01.1964)
531 automatic antenna (с 01.01.1963)
545 double roller blind used as luggage and passenger guard, lockable glove compartment (с 01.01.1967 по 31.07.1997)
halogen lamp unit and glove compartment
575 front folding armrest and right front seat with seat height adjustment
front folding armrest and headrest, left (с 01.04.1970)
571 + 574 (с 01.01.1963 по 29.02.1968)
588 Thermoking air conditioner and electric window lifters (front doors) (с 01.04.1970 по 31.12.1972)
automatic climate control and electric window lifters (front and rear doors) (с 01.01.1977)
593 headlamp flasher and turn signal lamps - italy (с 01.01.1963 по 31.07.1965)
headlamp flasher and turn signal lamps, front, crystal clear (с 01.08.1965 по 31.01.1967)
heat-insulating glass, rear window pane (с 01.02.1967 по 31.01.1971)
heat-insulating glass, all-around, heated rear window pane (single-sheet safety glass), band filter
green heat-insulating glass all round, heated rear window, single pane safety glass - tinted strip (с 01.01.1972)
639 radial-ply tires, elimination of warning triangle (с 01.11.1973 по 31.10.1974)
elimination of first-aid box and warning triangle (с 01.08.1977)
640 aluminium disc wheels with radial-ply tires (с 01.10.1969 по 31.12.1989)
tires with tube (с 01.01.1963 по 31.08.1965)
15-hole light alloy rims (с 01.01.1990)
668 662 + 666 (с 01.01.1963 по 28.02.1963)

673 high-capacity battery (с 01.01.1964)
801 Change of year of model, last figure shows new model year
844 instrument housing at instrument panel leather trim (с 01.10.1965 по 28.02.1968)
folding seat bench in loading compartment, reverse to direction of travel (с 01.10.1977)