53 is the chasis code of the Scirocco. 53A is the Mk1 Scirocco (1975-1981) and 53B is for the Mk2 (1982-1988)
Roadtrip Blog from Timbo's 84 Scirocco
53 is the chasis code of the Scirocco. 53A is the Mk1 Scirocco (1975-1981) and 53B is for the Mk2 (1982-1988)