package (M637) was also available. Dual air bags (left hand drive models), limited-slip differential and ABS were optional. Design 90 16-inch cast alloy wheels were standard equipment. 944 S2 Cabriolet The first Porsche 944 Cabriolet prototype was introduced at the Frankfurt Auto show in 1985. This first prototype was styled by Anotele Lapine and built by Bauer. This new Porsche 944 Cabriolet was very well received, but it wasn't until 1987 that the American Sunroof Corporation (ASC) won the contract to build the new model. It would take another two years for ASC to complete their new Weinsberg plant in Heilbronn, Germany; before they could begin production. So it was January 1989, before the new Porsche 944 S2 Cabriolet would begin to roll off ASC's assembly line. The S2 Cabriolet was a very complicated build, where 944 coupe bodies were taken off the assembly line at Neckarsulm, Germany and then delivered to ASC in Heilbronn, Germany. At ASC, structural steel reinforcement plates are welded in the front end of the car and floor pan area, to give the body the amount of torsional strength and crash safety required for a Cabriolet. After welding in these reinforcement plates, cuts are made in the body at the windshield frame, B pillars, rear side panels and tail panel, in preparation for coupe top removal. New parts to support the convertible top and the new rear deck lid are also welded in place. After the top is removed, the new Cabriolet body was sent back to Neckarsulm, where it is run through the standard production paint shop and assembly line for drive train install. Consequently, the structure of the paint finish and other corrosion inhibiting measures conform with the quality standards for Porsche and its new Cabriolet. The assembled Cabriolet was then sent back to ASC in Heilbronn for convertible top and trim installation. Production for the North American market would not start until May 1989, with only 16 of the 944 S2 Cabriolets being produced for the US market. The VIN numbers of these 16 cars for 1989 is very unique, starting with WP0B, with the 4th character "B" signifying the body type for a Targa. Porsche would correct this discrepancy and change the VIN numbers for the 1990 model to WP0C, with the 4th character "C" signifying a Cabriolet. The limited number of Cabriolets for 1989 went to only a handful of