When doing replacement or upgrading on 2010 – 2018 Mercedes-Benz Sprinter 2500 3500 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 Headlight2010 – 2018 H7
High Beam Headlight2010 – 2018 H7
Front Fog Light2010 – 2018 H8/H11/H16
Back Up Light2010 – 2018 1156
Brake2010 – 2018 1157
Front Side Marker2010 – 2018 194
Front Turn Signal2010 – 2018 3457NA
License Plate2010 – 2018 12961
Parking Light2010 – 2018 12396NA
Rear Side Marker2010 – 2018 12961
Rear Turn Signal2010 – 2018 PY21W
Tail Light2010 – 2018 1157
Courtesy2010 – 2018 12961
Interior Door2010 – 2018 DE3423
Map Light2010 – 2018 12961
High Beam and Low Beam Headlight2010 – 2013 D1S
2014 – 2018 D3S
Front Fog Light2010 – 2018 H8/H11/H16
Back Up Light2010 – 2018 1156
Brake2010 – 2018 1157
Front Side Marker2010 – 2018 194
Front Turn Signal2010 – 2018 3457NA
License Plate2010 – 2018 12961
Parking Light2010 – 2013 12396NA
Rear Side Marker2010 – 2018 12961
Rear Turn Signal2010 – 2018 PY21W
Tail Light2010 – 2018 1157
Courtesy2010 – 2018 12961
Interior Door2010 – 2018 DE3423
Map Light2010 – 2018 12961
Low Beam Headlight2010 – 2018 H7
High Beam Headlight2010 – 2018 H7
Front Fog Light2010 – 2018 H8/H11/H16
Back Up Light2010 – 2018 1156
Brake2010 – 2018 1157
Front Side Marker2010 – 2018 194
Front Turn Signal2010 – 2018 3457NA
License Plate2010 – 2018 12961
Parking Light2010 – 2018 12396NA
Rear Side Marker2010 – 2018 12961
Rear Turn Signal2010 – 2018 PY21W
Tail Light2010 – 2018 1157
Courtesy2010 – 2018 12961
Interior Door2010 – 2018 DE3423
Map Light2010 – 2018 12961
High Beam and Low Beam Headlight2010 – 2013 D1S
2014 – 2018 D3S
Front Fog Light2010 – 2018 H8/H11/H16
Back Up Light2010 – 2018 1156
Brake2010 – 2012, 2014 – 2018 1157
2013 P21/5W
Front Side Marker2010 – 2018 194
Front Turn Signal2010 – 2018 3457NA
License Plate2010 – 2018 12961
Parking Light2010 – 2013 12396NA
Rear Side Marker2010 – 2018 12961
Rear Turn Signal2010 – 2018 PY21W
Tail Light2010 – 2018 1157
Courtesy2010 – 2018 12961
Interior Door2010 – 2018 DE3423
Map Light2010 – 2018 12961