Problems with my A6

-Cruise Control not working
-Worn out drivers seat
-Use to get up to 32 MPG, now I only get 19 or 20 MPG
-Air conditioning doesnt work anymore
-Some times the buttons for the climate control doesnt work
-a couple burnt out dash lights
-Changed out igintion switch from one I got off ebay, now the accessory wire for the radio doesnt work.
-Fading Peeling Paint

I want to fix the cruise control, try to get the gas mileage back up, fix the worn out seat, replace the dash lights, and possibly more