Hi there, got a mk5 golf golf 1.4. Noticed the battery light was flickering like a disco light, took it to my mechanic who tested power and said it was fine. I noticed when going up a hill the radio would cut out, but more alarmingly on the motorway the dash power cut out and all the dials dropped. I just noticed it's also the headlights too, it seems to be when the car is put under a bit of pressure. As in motorway or up a hill. My mechanic and myself have no idea what it would be, I'd like to get it sorted rather than get another car any pointers would be most appreciated thanks!