gunthos

The light starting working again the other day but is now not working. I took it to my local garage he said I'll need to bring it back to him to have a proper look. Audi want 60 quid just for looking at it. Has someone on here had a similar problem If so what did you do about it? 

I took it to an audi garage and he said 240 quid to fit a new xenon bulb.  I went halfords and theye are saying I need to replace 2 bulbs. I'm genuinely confused now! Could it be that it's not the bulb but something else causing it to go? I've got an extended warranty but it doesn't cover bulbs 

One of my headlights needs replacing but I've no idea if it's xenon or halogen how can I tell? 

What is ad blue and dpf? I'm not familiar with any of this sorry 

I've recently bought an a3 sline 2.0 tdi sportback, before buying I looked at the MPG figures which were really impressive, however since I've had it a full tank doesn't seem to last that long and the number of miles to re fuel seems to go down quite quickly and doesn't seem in relation to my actual mileage. Anyone have similar issues or is there any advice to maximise economy? Thanks