When doing replacement or upgrading on 2008 Volkswagen R32 with capsule halogen headlamps HID, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2008 H7
High Beam Headlight 2008 H7
Front Fog Light 2008 9006
Back Up Light 2008 1156
Brake 2008 1156
Dome Light 2008 578
Front Side Marker 2008 12961
Front Turn Signal 2008 1156
License Plate 2008 12844
Parking Light 2008 194
Rear Side Marker 2008 12961
Rear Turn Signal 2008 1156
Tail Light 2008 1156
Luggage Compartment 2008 6411
Door Mirror Illumination Light 2008 194
Glove Box 2008 12256
Map Light 2008 12961
Stepwell 2008 12256
Low Beam Headlight 2008 D2S
High Beam Headlight 2008 H7
Front Fog Light 2008 9006
Back Up Light 2008 1156
Brake 2008 1156
Dome Light 2008 6411
Front Side Marker 2008 12961
Front Turn Signal 2008 H21W
License Plate 2008 12844
Parking Light 2008 194
Rear Side Marker 2008 12961
Rear Turn Signal 2008 1156
Tail Light 2008 1156
Luggage Compartment 2008 6411
Door Mirror Illumination Light 2008 194
Glove Box 2008 12256
Map Light 2008 12961
Stepwell 2008 12256