Last week I went to drive my Audi a3 but had various engine lights and when the AA came out the diagnostic showed no faults, he unplugged the battery and replugged it in but no change. He suggested the instrument cluster was broken. I booked it into the garage today and when I went to drive it a week later the dash board was back to normal. Is this a regular thing that it can just fix or could it be a connection issue? This is the first time it’s happened and owned the car since 2016 

Welcome Jenna,

Eliminating simple things first - when was the battery last renewed?

Regards,

Gareth.

Hi Gareth, 

I don’t recall but it’s relatively new and no issues with starting the car.

Regards 

Jen 

Instrument cluster issues are well documented. Look for instrument cluster repairers in your area. Probably will cost around £200 

Thanks Jen,

Due to the current electrical complexity of vehicles, the fact that the battery starts the car, is no guarantee that it’s able to satisfy the monitored requirements of all electrical components.

If it were mine, I’d still get a free ( eliminating?) battery test - Halfords store will do that - before spending any money on other components. It would be to your advantage not to rush into replacing the battery, if found to be substandard. Just report back of us first. 
Regards,

Gareth.