The car was significantly facelifted again in April 1979, known as the Series III, incorporating a subtle exterior redesign by Pininfarina. Changes from the Series II included thicker and more incorporated rubber bumpers with decorative chrome only on the top edge, flush door handles, one-piece front door glass without a separate quarter light, a grille with only vertical vanes, reverse lights moved from the boot plinth to the larger rear light clusters, and a revised roofline with narrower door frames and increased glass area. The C-pillar was also subtly modified with a more prominent "Hofmeister kink" at its base. The option of a sunroof and cruise control were also offered for the first time. Also For the series 3 Jaguar asked Pirelli to develop a new tyre the Cinturato P5 to improve the handling and performance of these luxury cars in 205/70R15 Cinturato P5 for the 6 cylinder cars and 215/70R15 Cinturato P5 for the V12