Page 67 of 384

Using the right bulbs
Replacement bulbs are specified in the chart below. Headlamp bulbs
must be marked with an authorized “D.O.T.” for North America and an
“E” for Europe to ensure lamp performance, light brightness and pattern
and safe visibility. The correct bulbs will not damage the lamp assembly
or void the lamp assembly warranty and will provide quality bulb burn
time.
Function Number of bulbsTrade
number
Headlamp high beam/
low beam2 D3S
Front park/turn/
sidemarker lamp23457AK
(amber)
Backup lamp 2 921
* Sidemarker lamp (rear) 2 LED
* Tail lamp 2 LED
Turn signal 4HPC 16WY
(amber)
License plate lamp 2 168
* High-mount brake lamp 1 LED
Fog lamp (if equipped) 2 H11
Map lamp 2 12V6W
Dome/reading lamps 3 578
All replacement bulbs are clear in color except where noted.
To replace all instrument panel lights, see your authorized dealer.
* To replace these lamps, see your authorized dealer.
Replacing interior bulbs
Check the operation of all bulbs frequently.
Replacing exterior bulbs
Check the operation of all bulbs frequently.
Replacing HID headlamp bulbs
The headlamps on your vehicle use a “high intensity discharge” source.
These lamps operate at a high voltage. When the bulb is burned out, the
bulb assembly must be replaced by your authorized dealer.
Lights
67
2012 MKS(mks)
Owners Guide, 1st Printing
USA(fus)
Page 69 of 384

5. Pull the bulb straight from the socket.
Note:The turn bulb is a socket/bulb assembly and the bulb cannot be
removed separately.
Install the new bulb(s) in reverse order.
Replacing high-mount brake lamp bulbs
Your vehicle is equipped with an LED center high-mount stop lamp. It is
designed to last the life of the vehicle. If replacement is required, it is
recommended that you see your authorized dealer.
Replacing license plate lamp bulbs
1. Make sure the headlamp switch is
in the off position.
2. Remove the two screws from the
license plate lamp assembly.
3. Remove bulb socket by turning
counterclockwise.
4. Carefully pull the bulb out from
the socket.
Install new bulb(s) in reverse order.
Replacing fog lamp bulbs
1. Make sure the fog lamp switch is in the off position.
2. Rotate the harness/bulb assembly
counterclockwise, to remove from
the fog lamp.
3. Carefully disconnect the bulb
from the harness assembly via the
two snap clips.
Install the new bulb in reverse order.
Lights
69
2012 MKS(mks)
Owners Guide, 1st Printing
USA(fus)
Page 380 of 384

cleaning ...................................299
coolant .....................................316
fail-safe cooling .......................320
lubrication specifications .......345
refill capacities ........................345
service points ..................307–308
Engine block heater .................222
Engine oil ..................................310
checking and adding ..............310
dipstick ....................................310
filter, specifications ................344
refill capacities ........................345
specifications ..........................345
Event data recording ....................7
Exhaust fumes ..........................222
F
Fail safe cooling ........................320
Fleet MyKey programming ......101
Floor mats .............................98–99
Fluid capacities .........................345
Fog lamps ....................................59
Four-Wheel Drive vehicles
driving off road .......................259
Fuel ............................................322
calculating fuel
economy ............................20, 328
cap ...........................................324
capacity ...................................345
choosing the right fuel ...........325
detergent in fuel .....................326
filler funnel .............................327
filling your vehicle with
fuel ...........................322, 324, 328
filter, specifications ........322, 344
fuel pump shut-off ..................266
improving fuel economy ........328
octane rating ...................326, 349quality ......................................326
running out of fuel .........282, 327
safety information relating to
automotive fuels .....................322
Fuses ..........................................267
G
Garage door opener ....................94
Gas cap (see Fuel cap) ............324
Gas mileage
(see Fuel economy) .................328
Gauges .........................................17
H
Hazard flashers .........................266
Headlamps ...................................57
aiming ........................................63
autolamp system .......................58
bulb specifications ....................67
daytime running lights .............63
flash to pass ..............................62
high beam .................................59
turning on and off ....................57
Heated Seats .....................133–134
Heating
heating and air conditioning
system .................................49, 52
Homelink wireless control
system ..........................................94
Hood ..........................................306
I
Ignition ...............................218, 349
Illuminated visor mirror .............72
Index
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2012 MKS(mks)
Owners Guide, 1st Printing
USA(fus)
Page 381 of 384

Infant seats
(see Safety seats) .....................173
Inspection/maintenance (I/M)
testing ........................................333
Instrument panel
cleaning ...................................301
cluster ........................................12
lighting up panel and
interior .......................................63
Intelligent Access Key ..............100
Intelligent Access with push
button start ...............................113
J
Jack ............................................274
positioning ...............................274
storage .....................................274
Jump-starting your vehicle ......282
K
Keyless entry system
autolock ...................................108
keypad .....................................120
locking and unlocking doors ..122
programming entry code .......120
Keys ...........................................100
positions of the ignition .........218
L
Lamps
autolamp system .......................58
bulb replacement
specifications chart ..................67
daytime running light ...............63
fog lamps ...................................59
headlamps .................................57
headlamps, flash to pass ..........62instrument panel, dimming .....63
interior lamps .....................65, 67
LATCH anchors .........................177
Lights, warning and indicator ....12
anti-lock brakes (ABS) ..........225
Load limits .................................206
Locks
autolock ...................................108
childproof ................................111
doors ........................................107
Lubricant specifications ...........345
Lug nuts ....................................281
Lumbar support, seats .............132
M
Message center .....................18–19
english/metric button ...............23
system check button ................23
warning messages .....................23
Mirrors .........................................79
automatic dimming rearview
mirror ........................................79
heated ............................49, 52, 80
programmable memory ..........116
side view mirrors (power) .......79
Moon roof ....................................92
Motorcraftparts ..............303, 344
MyKey ........................................101
N
Navigation system .......................48
O
Octane rating ............................326
Oil (see Engine oil) ..................310
Index
381
2012 MKS(mks)
Owners Guide, 1st Printing
USA(fus)