3 Problems Audi 80 B4

Hi guys! Now I’ve got my Audi 80 T89 driven together and total damage has increased to n B4 2.0 with 115 hp. I’m very happy with the purchase, pulls (compared to the other car) very well and besides, I like the better designed trunk (Limo) a lot better, not only because it is bigger than the 89. However, I have 3 problems: 1. The engine sometimes jerks extremely (when driving at constant speed, possibly the relay problem could be the one described here. 2. The clock somehow doesn’t really work. It doesn’t work, but it doesn’t shine (the digits), had that with my old also for a short time but then no idea why suddenly again ok. 3. my radio (blue point Daytona) seems to be constantly running in night mode (the switch on lights up even when the car is switched off) also the light-summer goes off when the driver’s door is open the engine and the radio is on. Do I need a possible adapter to connect there? I think (hope) that Is so far everything, I would be very happy about a few tips. MfG, Stefan