BMW 3/20 PS AM 4 Roll-top Sedan

The customer was able to purchase this special form of sedan at an additional cost of just RM 135. The middle section of the sedan roof was made of coated plastic for reasons of production. In the roll-top sedan, this was replaced by a design in which the rubberised roof material could be rolled up from front to back. This rolled-up roof was then fastened above the rear window using leather straps. Passengers travelling in this hybrid between sedan and convertible could sit half in the open air and were able to enjoy a view looking skywards while also giving them a high degree of protection against draughts.