Below is a list of light bulb types used in 2012- MERCEDES-BENZ CITAN lighting system, covering estate, van and panel van/estate vehicles.
Headlight bulb: low beam - H4 / high beam - H4
Parking light bulb: W5W
Front indicator/turn signal bulb: PY21W
Side direction indicator bulb: WY5W
Rear indicator/turn signal bulb: PY21W
Tail light bulb: P21/5W
Brake light bulb: P21/5W
Back-up light bulb: P21W
Rear fog light bulb: P21W
License plate light bulb: W5W
Auxiliary stop light bulb: W16W
Interior light bulb: W5W
Boot light bulb: W5W