Mercedes-Benz GLK-Class 2012 Owners Manual - Manual (Page 111)

Never use a bulb which has been dropped.
Such a bulb may break or even explode and
injure you.
Halogen bulbs are pressurized and can
explode when you change them, particularly
if they are very hot. You should therefore wear
eye protection and gloves when you are
changing them.
Overview: changing bulbs/bulb types
You can change the following bulbs. The bulb
type can be found in the legend.
Halogen headlamps
:
Turn signal lamp/side marker lamp:
WY 5 W
;
Turn signal lamp: PY 21 W
=
High-beam headlamp: H7 55 W
?
Parking lamp/standing lamp: W 5 W
A
Low-beam headlamp: H7 55 W
Bi-Xenon headlamps
:
Turn signal lamp/side marker lamp:
WY 5 W
; Turn signal lamp: PY 21 W
= Cornering lamp: H7 55 W
?
Parking lamp/standing lamp: W 5 W
Tail lamp with/without LED
:
Tail lamp/brake lamp: P 21 W
;
Turn signal lamp: PY 21 W
= Backup lamp: P 21 W or W 16 W 11
?
Tail lamp/rear fog lamp: P 21 W
A
Side marker lamp: W 3 W
11 Vehicles without LED turn signal lamps (W 16 W)/vehicles with LED turn signal lamps (P 21 W).
Replacing bulbs
109
Lights and windshield wipers
Z