Your car is most likely a OBDI car. All cars were OBDII by 1996. The "C" car because it was designed in these times had OBDII in 94, but the rest got them as production schedules allowed and by 1996.
The OBDI connector, the "38 pin" connector, is under a cap something like a coolant cap (black) situated at the forward side of the CAN box in the right rear of the engine compartment (passengers side). There may be a LED for doing DM testing (diagnostic module - where the light is turned on from) outside the CAN box. If not you will need a connector diagram and a impulse counting method. (the general description of which can be read in the evaluating engine controls DIY article and in many threads).
Bosch Master, ASE Master, L1
33 years MB technician