Page 174 of 474
173 Controls in detail
Good visibility
Sun visors
The sun visors protect you from sun glare 
while driving.
1Mounting
2Mirror cover
3Mirror lamp
4Sun visor
Swing sun visor4 down when you 
experience glare.
To use illuminated mirror, lift up mirror 
cover2.
Warning!
G
Do not use the vanity mirror while driving.
Keep the mirrors in the sun visors closed 
while vehicle is in motion. Reflected glare 
can endanger you and others.
iIf sun visor4 is disengaged from 
mounting1 with mirror cover2 
open, mirror lamp3 will switch off.iIf sunlight enters through a side 
window, close mirror cover2 (if 
open), disengage sun visor4 from 
mounting1 and pivot to the side. 
     
        
        Page 241 of 474

240 Controls in detailPower windowsOpening and closing the windows
The side windows are opened and closed 
electrically. The switches for all the side 
windows are on the driver’s door. The 
switches for the respective windows are 
on the front passenger door and the rear 
doors.
1Left front window
2Right front window
3Right rear window
4Left rear window
5Rear window override switch 
(
page 85)
Warning!
G
When closing the power windows, make 
sure there is no danger of anyone being 
harmed by the closing procedure.
The closing of the door windows can be im-
mediately halted by releasing the switch or, 
if switch was pulled past the resistance 
point and released, by either pressing or 
pulling the respective switch.
If the window encounters an obstruction 
t h a t  b l o c k s  i t s  p a t h  i n  a  c i r c u m s t a n c e  w h e r e  
you pulled the switch past the resistance 
point and released it to close the window, 
the automatic reversal function will stop the 
window and open it slightly.
If the window encounters an obstruction 
that blocks its path in a circumstance where 
you are closing the window by pulling and 
holding the switch, by pressing and holding 
button‹ on the SmartKey, or by press-
ing and holding button, ore on the 
climate control panel, the automatic rever-
sal function will not operate.
When leaving the vehicle, always remove the 
SmartKey from the starter switch, take it 
with you, and lock the vehicle. Do not leave 
children unattended in the vehicle, or with 
access to an unlocked vehicle. Unsuper-
vised use of vehicle equipment can cause an 
accident and/or serious personal injury. 
     
        
        Page 243 of 474

242 Controls in detailPower windows
Stopping windows
Press or pull respective switch again.
Synchronizing power windows
The power windows must be 
resynchronized each time
after the battery has been 
disconnected or discharged.
if the power windows cannot be fully 
opened (Express-open) or closed 
(Express-close).
Switch on the ignition (
page 33).
Pull the power window switches until 
the side windows are closed.
Hold the switches for approximately 
1 second.
The power windows are synchronized.
!If the upward movement of the window 
is blocked during the closing 
procedure, the window will stop and 
open slightly.
Remove the obstruction, pull the 
switch again past the resistance point 
and release.
If the window still does not close when 
there is no obstruction, then pull and 
hold the switch again. The side window 
will then close without the obstruction 
sensor function.
Warning!
G
Driver’s door only:
If within 5 seconds you again pull the switch 
past the resistance point and release, the 
automatic reversal will not function. 
     
        
        Page 259 of 474

258 Controls in detailUseful featuresArmrest storage compartments
1Handle
2Button, passenger side
3Button, driver’s side
Opening storage compartment
Pull handle1 and lift armrest.
Closing storage compartment
Press armrest down until it engages 
into place.Opening telephone compartment
Press button3 on driver’s side or 
button2 on passenger side and lift 
armrest.
Closing telephone compartment
Press armrest down until it engages 
into place.
Armrest in the rear passenger 
compartment
Pull the top of the armrest out and fold 
it down.Parcel net in front passenger footwell 
(all models, except C 280 4MATIC and 
C 350 4MATIC)
A small convenience parcel net is located 
in the front passenger footwell. It is for 
small and light items, such as road maps, 
mail, etc.
Warning!
G
The parcel net is intended for storing 
light-weight items only. 
Heavy objects, objects with sharp edges or 
fragile objects may not be transported in the 
parcel net. In an accident, during hard brak-
ing, or sudden maneuvers, they could be 
thrown around inside the vehicle and cause 
injury to vehicle occupants. 
The parcel net cannot protect transported 
goods in the event of an accident. 
     
        
        Page 262 of 474

261 Controls in detail
Useful features
Ashtrays
Center console ashtray
1Cover plate
2Sliding button
3Ashtray insert
Briefly press the bottom of cover 
plate1.
The cover plate opens automatically.Removing ashtray insert
Secure vehicle from movement by 
setting the parking brake.
Move the gear selector lever to 
positionN (manual transmission: 
second gear).
Now you have more room to take out 
the ashtray insert.
Push sliding button2 to the right.
The ashtray insert3 slides out 
slightly.
Remove the ashtray insert.Reinstalling ashtray insert
Push the ashtray insert3 down into 
the retainer until it engages.
Push down cover plate1 to close 
ashtray.
The cover plate engages.
Rear seat ashtray
1Button
2Ashtray insert
3Cover
Pull at top of cover3.
Warning!
G
Remove front ashtray only with vehicle 
standing still. Set the parking brake to 
secure vehicle from movement. Move gear 
selector lever to positionN (manual trans-
mission: second gear). With gear selector 
lever in positionN (manual transmission: 
second gear) turn off the engine. 
     
        
        Page 263 of 474
262 Controls in detailUseful featuresRemoving ashtray insert
Push button1 to disengage ashtray 
insert2 and remove it.
Reinstalling ashtray insert
Push the ashtray insert2 down into 
the retainer until it engages.
Push at top of cover3 to close 
ashtray.
Cigarette lighter
Switch on the ignition (
page 33).1Cover plate
2Cigarette lighter
Briefly press the bottom of cover 
plate1.
The cover plate opens automatically.
Push in cigarette lighter2.
The cigarette lighter will pop out 
automatically when hot.
Warning!
G
Never touch the heating element or sides of 
the lighter; they are extremely hot. Hold the 
knob only.
When leaving the vehicle, always remove the 
SmartKey from the starter switch, take it 
with you, and lock the vehicle. Do not leave 
children unattended in the vehicle, or with 
access to an unlocked vehicle. Unsuper-
vised use of vehicle equipment may cause 
an accident and/or serious personal injury. 
     
        
        Page 290 of 474

289 Operation
Driving instructions
Winter driving instructions
The most important rule for slippery or icy 
roads is to drive sensibly and to avoid 
abrupt acceleration, braking and steering 
maneuvers. Do not use the cruise control 
system under such conditions.
When the vehicle is in danger of skidding, 
move gear selector lever to positionN or in 
case of manual transmission declutch. 
Try to keep the vehicle under control by 
corrective steering action.Road salts and chemicals can adversely 
affect braking efficiency. Increased pedal 
force may become necessary to produce 
the normal braking effect.
Depressing the brake pedal periodically 
when traveling at length on salt-strewn 
roads can bring road-salt-impaired braking 
efficiency back to normal. 
If the vehicle is parked after being driven 
on salt-treated roads, the braking 
efficiency should be tested as soon as 
possible after driving is resumed.
For more information, see “Winter driving” 
(
page 336).
iFor information on driving with snow 
chains, see “Snow chains” 
(page 337).
Warning!
G
On slippery road surfaces, never downshift 
in order to obtain braking action. This could 
result in drive wheel slip and reduced 
vehicle control. Your vehicle’s ABS will not 
prevent this type of control loss.
Warning!
G
Make sure not to endanger any other road 
users when carrying out these braking 
maneuvers.
Warning!
G
If the vehicle becomes stuck in snow, make 
sure snow is kept clear of the exhaust pipe 
and from around the vehicle with the engine 
running. Otherwise, deadly carbon monox-
ide (CO) gases may enter vehicle interior re-
sulting in unconsciousness and death.
To assure sufficient fresh air ventilation, 
open a window slightly on the side of the 
vehicle not facing the wind.Warning!
G
The outside temperature indicator is not 
designed to serve as an ice-warning device 
and is therefore unsuitable for that purpose. 
Indicated temperatures just above the 
freezing point do not guarantee that the 
road surface is free of ice. 
     
        
        Page 307 of 474

306 OperationTires and wheelsTread depth 
Do not allow your tires to wear down too 
far. Adhesion properties on wet roads are 
sharply reduced at tread depths under 1/8in (3 mm).
Treadwear indicators (TWI) are required by 
law. These indicators are located in six 
places on the tread circumference and 
become visible at a tread depth of approx-
imately 
1/16
in (1.6 mm), at which point 
the tire is considered worn and should be 
replaced.
Recommended minimum tire tread depth:
Summer tires 
1/8in (3 mm)
Winter tires 
1/6in (4 mm)
1TWI (T
read W
ear I
ndicator)
The treadwear indicator appears as a solid 
band across the tread.Storing tires
Cleaning tires
Warning!
G
Although the applicable federal motor safety 
laws consider a tire to be worn when the 
treadwear indicators (TWI) become visible at 
approximately 
1/16in (1.6 mm), we 
recommend that you do not allow your tires
to wear down to that level. As tread depth 
approaches 
1/8in (3 mm), the adhesion 
properties on a wet road are sharply 
reduced.
Depending upon the weather and/or road 
surface (conditions), the tire traction varies 
widely.
!Keep unmounted tires in a cool, dry 
place with as little exposure to light as 
possible. Protect tires from contact 
with oil, grease and gasoline.!Never use a round nozzle to power 
wash tires. The intense jet of water can 
result in damage to the tire.
Always replace a damaged tire.