Record the visible form
Sketch wheel placement, roof line, and the main body masses. Compare those relationships from several views. A recognisable vehicle depends on proportion before small trim details.
Label the evidence
Separate what you observe in a photograph from dimensions supplied by a reliable technical reference. Do not infer an exact specification from a perspective view.
Build a useful reference sheet
Keep views, scale notes, and source labels together. A compact sheet helps maintain consistency across drawings without copying unrelated details from different models.