[computamedic]

The rear brakes on the C2 were changed from 2-pot to the same 4-pot calipers used on the C4. All 964 calipers are black as standard apart from the Turbo 3.6 which had red.

Air bags and the consequently revised interior/dash were standard by '93 but I suspect that even the US '91 cars had airbags. It was only the RoW cars that waited until around '92 to get them.

The dual spring wiper arms were certainly a late addition but I don't have any details about the introduction date.

I'm not sure the distributor vent ever reached a production 964. I've certainly seen very late cars without it. I think it may have only been introduced in production for the 993.

Regards

Dave