Massive overheating problems when driving in temperatures above 80 degrees. Ran cool and well otherwise. Changing the thermostat did nothing to help. The radiator was never plugged, either. Installation of a big, finned oil cooler was necessary to keep the 1.7L VW engine from burning up in hot weather. Also, running the heater with the A/C off on hot days helped cool this perspiring motor, while roasting the driver and passengers.
The 1982 Scirocco used a series of expensive electronic plug-in modules in place of fuses. The modules would frequently burn out. One module was part of the ignition system and would cause the car to come to a dead stop in traffic when it would fail.
Body parts and factory mechanical parts prices were super high. When I owned the VW, it was listed (by a major insurance company) as the second most expensive car for body repair. It was as expensive as maintaining a Porche. The car was made in Mexico (as VWs are today), so why the exorbitant parts prices?