feature list included stainless-steel body panels, gull-wing doors with cryogenically treated torsion bars, 5-speed manual transmission, Bridge of Weir leather seats, air conditioning, AM/FM cassette stereo system, power windows, locks and mirrors, a tilt and telescopic steering wheel, tinted glass, body side moldings, intermittent windshield wipers, and electric rear-window defogger. Several dealer options were available, including a car cover, sheepskin seat covers, floor mats, car care cleaning kit, black textured accent stripes, grey scotch-cal accent stripes, a luggage rack and a ski-rack adapter. Production changes Although there were no typical yearly updates to the DeLorean, several changes were made to the DeLorean during production. Instead of making changes at the end of the model year, DMC implemented changes mid-production. This resulted in no clear distinction between the 1981, 1982, and 1983 model years, but with subtle changes taking place almost continuously throughout the production run. Hood styles The original hood of the DeLorean had grooves running down both sides. It included a fuel filler flap to simplify fuel filling. These cars typically had a locking fuel cap to prevent fuel tampering or theft by siphoning. In August 1981, the fuel flap was removed from the hood (although the hood creases remained). After the supply of locking caps was exhausted, the company switched to a non-locking fuel cap (resulting in at least 500 cars with no hood flap, but with locking fuel caps). The final styling for the hood included the addition of a cast metal DeLorean emblem in the lower right corner and the removal of the grooves, resulting in a completely flat hood. This final version was on all 1982–1983 model year vehicles. Other changes Closing the gull-wing door from the inside can be achieved by using a grab handle. For people with shorter arms, DMC installed leather pull straps attached to the grab handle. Beginning with late-model 1981 cars, DMC revised the location of the leather pull strap to be centrally mounted and integrated into the lower door panel. The rear trim panel has an armrest extension that is visibly two separate pieces on early 1981 models; this armrest has a tendency to break loose as people get in and out of the vehicle. In late 1981, this was resolved by having the armrest extension integrated into the rear trim panel, the assembly wrapped in vacuum-formed vinyl. Although the styling of the DeLorean's wheels remained unchanged, the wheels