Audi 80 SE, 2.0L, 1995. The temperature gauge in the dash is dead, and iv been told its the temperature sender. iv looked and its between 2 senders. 1 is blue with 2 terminals, and the other is grey, with 3 round terms. went down the parts shop, and the guy didn't know which one. Help! driving to Ireland in a few days, and don't really want to risk not knowing the temp of the engine, really appreciate help.