Filed under FAQ / OBD-2 generic

Answer:

The OBD2 DLC should be located in the passenger or driver's compartment in the area bounded by the driver's end of the instrument panel to 300 mm (~1 ft) beyond the vehicle centerline, attached to the instrument panel and easy to access from the driver's seat. The preferred location is between the steering column and the vehicle centerline.

This image shows OBD-II connector on Mercedes-Benz 2002 W203 C-class (manual transmission):

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