hey man, i'm not sure if this will help at all, but on my mk3 gti, my blinkers work but don't blink in my cluster when they're on, also my front wipers don't work (have replaced motor, relay, everything). figured the problem was in my steering stalk, still no wipers or blinkers in the cluster. All i can think of now is wiring must be messed up in mine.

if you already checked the fuses then maybe try a relay if you haven't? i'm in the same boat trying to figure mine out i just don't want to take my dash back out to look at the wiring