Below is a list of light bulb types used in 2012- MERCEDES-BENZ SL-CLASS lighting system, covering convertible vehicles.
Headlight bulb: low beam - D1S / high beam - D1S
Cornering light bulb: H7
Boot light bulb: W5W
Light bulb sizes for other MERCEDES-BENZ SL-CLASS generations: SL-CLASS (R230)