Going to look at a GTI tomorrow, anything I should know?

off top of my head;
headlights getting only half the voltage (never figured out why), power windows working 50% of the time, some weird tranny problems, cracked heater core = coolant spilling inside the car (LOL, I actually laughed hard when I saw it), oil plug on the oil pan broke off and he spilt all the oil on the street (luckily he noticed it right away)…
I know they had tons of problems, I just can’t remember all the stuff they told me.