Below is a list of light bulb types used in 2007- AUDI A5 lighting system, covering convertible, coupé and hatchback vehicles.
Headlight bulb: low beam - H7 or D3S / high beam - D3S, H7 or H15
Parking light bulb: W5W or PSX26W
Fog light bulb: H11 or H8
Front indicator/turn signal bulb: H21W
Daytime running light bulb: H7, H15 or PSX26W
Cornering light bulb: H7
Rear indicator/turn signal bulb: W16W
Tail light bulb: P21W
Brake light bulb: P21W
Back-up light bulb: W16W
Rear fog light bulb: H21W or P21W
License plate light bulb: C5W
Interior light bulb: C5W or W5W
Door safety light bulb: W5W
Boot light bulb: W5W
Entry light bulb: W5W
Reading light bulb: W5W
Glove compartment light bulb: W5W
Light bulb sizes for other AUDI A5 generations: A5 (F5)