FunctionFig. 106
Range of sensors
Read and observe and on page 107 first.
Approximate range of sensors
Range » Fig. 106Distance behind the vehicle (in cm)A160B60
Acoustic signals and display
The interval between the acoustic signals becomes shorter as the clearance is
reduced. A continuous tone sounds from a distance of approx. 30 cm - danger
area. From this moment on, do not continue reversing!
Description of the indications in the radio or navigation system display, » the
radio instruction manual, navigation system user guide.
Activation/deactivation
Read and observe
and on page 107 first.
The system is activated automatically by engaging the reverse gear. This is
confirmed by a brief audible signal.
The system is deactivated by disengaging reverse gear.
Displaying an error
If a warning signal sounds for about 3 seconds after activating the system and
there is no obstacle close to your car, this indicates a system fault. Seek help
from a specialist garage.
NoteFor vehicles with a factory-fitted towing device, the system cannot be activa-
ted when towing a trailer.
Cruise Control System
Introduction
This chapter contains information on the following subjects:
Functioning
108
Operating Description
109
The Cruise Control System (CCS) maintains a set speed without you having to
actuate the accelerator pedal.
The status where the CCS maintains the speed is referred to hereinafter as the
control .
WARNING■
The CCS only serves as an assistance and does not relieve the driver of
the responsibility for the vehicle operation.■
Always adjust the speed and driving style to the current visibility, weath-
er, road and traffic conditions.
Functioning
Read and observe
on page 108 first.
Basic requirements for starting the control The CCS is activated.
On vehicles with a manual transmission , the second gear or higher must
be engaged.
On vehicles with an automatic transmission , the selector lever must be in
the D, S position or in the Tiptronic position.
The current speed must be higher than 20 km/hr.
This is only possible within the range which is permitted by the power output
and braking power of the engine.
108Driving
WARNING■When you charge a battery, hydrogen is released, and a highly explosive
gas mixture is also produced. An explosion can be caused through sparkling
over during unclamping or loosening of the cable plug while the ignition is
on.■
Creating a bridge between the poles on the battery (e.g. with metal ob-
jects - cables) creates a short circuit - risk of damage to the battery, explo-
sion and burning of the battery, jets of acid spurting out.
■
Avoid creating sparks when working with cables and electrical devices.
Strong sparking represents a risk of injury.
■
Before carrying out any work on the electrical system, switch off the en-
gine, the ignition and all electrical consumers and disconnect the negative
terminal (-).
■
“Quick-charging” the vehicle battery is dangerous and requires a special
charger and specialist knowledge.
■
We therefore recommend that vehicle batteries be “rapidly charged” by a
specialist garage.
CAUTION
On vehicles with the START-STOP system, the pole terminal of the charger
must not be connected directly to the negative terminal of the vehicle battery,
but only to the engine earth » page 158, Jump-starting in vehicles with the
START-STOP system .
Replacing
Read and observe
and on page 139 first.
The new vehicle battery must have the same capacity, voltage, current and
size as the original battery. Suitable vehicle battery types can be purchased
from a specialist garage.
We recommend having the battery replaced by a specialist garage, where the
new vehicle battery will be installed properly and the original battery will be
disposed of in accordance with national regulations.
Disconnecting and reconnecting
Read and observe
and on page 139 first.
Disconnecting
›
Switch off the ignition.
›First, disconnect the negative terminal (-) first, then the positive (+) terminal
of the battery.
Connecting›
First, connect the positive (+) first, then the negative (-) battery terminal.
After disconnecting and re-connecting the vehicle battery, the following func-
tions or devices are partially or completely inoperative.
Function / deviceCommissioningRadio and/or navigation systemEnter code number » User radio
manual and/or » navigation
system user manualTime settings» page 29
CAUTION
■ Disconnect the vehicle battery only with the ignition turned off - there is a
risk of damaging the electrical system of the vehicle.■
Under no circumstances must the battery cables be connected incorrectly –
risk of a cable fire.
Note
■ After disconnecting and re-connecting the vehicle battery, we recommend
having the vehicle checked by a specialist to ensure that the full functionality
of all electrical systems is guaranteed.■
The data of the multi-function display will be reset.
Automatic load deactivation
Read and observe
and on page 139 first.
The vehicle voltage control unit automatically prevents the battery from dis-
charging when the battery is put under high levels of strain. This manifests it-
self by the following.
› The idling speed is raised to allow the generator to deliver more electricity to
the electrical system.
› Where necessary, large convenience consumers such as seat heaters and
rear window heaters have their power limited or are shut off completely in
the event of an emergency.
141Inspecting and replenishing
