Does anyone know how to fix the audio signal thats used when i turn the indicator of turning left or right... cause when i indicate a turn after that i get random clicks (random knocking) - reapeating of the left/right sound... any idea how to fix these annoying sounds ?

Its either your hazard switch that’s gone faulty (as that’s where the indicator relay is) or there’s a lot of dirt in the electrical internals if your indicator switch (turn signal arm). I’d replace the hazard switch firstly and if that doesn’t work try electrical contact cleaner sprayed into the indicator switch. I’d put money on it being the hazard switch. 

Where can I get this switch from? Searched online but can only find second hand. I've a 55plate 1.9TDI Estate.

 

Having same problems.

local auto electrics shop - same place where you buy yourignition coil or spark plugs or something like that