2015 MERCEDES-BENZ S-Class page 105

Distance warning function
Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems (Y page 76).G
WARNING
The distance warning function does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R when cornering
Thus, the distance warning function cannot
provide a warning in all critical situations.
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake. G
WARNING
The distance warning function cannot always
clearly identify objects and complex traffic
situations.
In such cases, the distance warning function
may:
R give an unnecessary warning
R not give a warning
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and do not rely solely on the distance
warning function.
Function X To activate/deactivate: activate or deac-
tivate the distance warning function in the
on-board computer (Y page 309).
If the distance warning function is not activa-
ted, the æsymbol appears in the assis-
tance graphics display.
The distance warning function can help you to minimize the risk of a front-end collision with
a vehicle ahead or reduce the effects of such
a collision. If the distance warning function
detects that there is a risk of a collision, you
will be warned visually and acoustically. Starting at a speed of around 4 mph (7 km/h),
the distance warning function warns you if
you rapidly approach a vehicle in front. An
intermittent warning tone will then sound,
and the ·distance warning lamp will light
up in the instrument cluster.
X Brake immediately in order to increase the
distance from the vehicle in front.
or
X Take evasive action, provided it is safe to do
so.
Due to the nature of the system, particularly
complicated but non-critical driving condi-
tions may also cause the system to display a
warning.
With the help of the radar sensor system, the
distance warning function can detect obsta-
cles that are in the path of your vehicle for an extended period of time.
Up to a speed of around 44 mph (70 km/h),
the distance warning function can also react
to stationary obstacles, such as stopped or
parked vehicles.
If you approach an obstacle and the distance
warning function detects a risk of a collision,
the system will initially alert you both visually
and acoustically.
Autonomous braking function If the driver does not react to the distance
warning signal in a critical situation, COLLI-
SION PREVENTION ASSIST PLUS can assist
with the autonomous braking function.
The autonomous braking function:
R gives the driver more time to react to criti-
cal driving situations
R can help the driver to avoid an accident or
R reduces the effects of an accident
The autonomous braking function is available in the following speed ranges:
R from 5 mph (7 km/h) to approx. 65 mph
(105 km/ h)for moving objects
R from 5 mph (7 km/h) to approx. 31 mph
(50 km/h) for stationary objects 80
Driving safety systemsSafety

onds until the battery check lamp flashes
twice (Y
page 94). Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered. Switch off the alarm
(Y page 86).
If you unlock the vehicle using the mechanical key, the fuel filler flap will not be unlocked
automatically.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch :in the direction of
the arrow and at the same time remove
mechanical key ;from the SmartKey.
For further information about: R unlocking the driver's door (Y page 98)
R unlocking the trunk (Y page 105)
R locking the vehicle (Y page 99)
Inserting the mechanical key X
Push mechanical key ;completely into
the SmartKey until it engages and release
catch :is back in its basic position. SmartKey battery
Important safety notes G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately. H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment. Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National
guidelines must be observed during disposal.
In California, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist workshop. SmartKey
93Opening and closing Z

Activating the function to lock the trunk sep-
arately:
X Close the trunk lid.
X Open the glove box.
X Push the switch to position ;.
If the vehicle is unlocked centrally, the
trunk remains locked.
i You can also lock the glove box
(Y page 373).
Deactivating the function to lock the trunk
separately:
X Open the glove box.
X Push the switch to position :.
If the vehicle is unlocked centrally, the
trunk will also be unlocked. Unlocking the trunk (mechanical key)
! The trunk lid swings upwards when
opened. Therefore, make sure that there is sufficient clearance above the trunk lid.
If the trunk lid can no longer be unlocked: R using the SmartKey, or
R using HANDS-FREE ACCESS, or
R using the remote operating switch in the
door control panel:
Use the emergency release.
If you use the mechanical key to unlock and
open the trunk lid, the anti-theft alarm system
will be triggered. Switch off the alarm
(Y page 86). X
Take the mechanical key out of the Smart-
Key (Y page 93).
X Insert the mechanical key into the trunk lid
lock as far as it will go. X
Turn the mechanical key from position 1
counter-clockwise as far as it will go to
position 2.
The trunk is unlocked.
X Turn the mechanical key back to position
1 and remove it.
X Insert the mechanical key into the Smart-
Key. Trunk emergency release
You can unlock the trunk lid from the inside
with the emergency release button. X
Press emergency release button :briefly.
The trunk lid unlocks and opens.
The trunk lid can be unlocked with the trunk
lid emergency release when the vehicle is
stationary or while driving. Trunk
105Opening and closing Z