Set the memory to zero at the start of a new measurement if you wish to de-
termine the average fuel consumption over a certain period » page 46.
After erasing the memory, no fuel consumption data will appear for the first 100 m driven.
The indicated information is updated continuously while you are driving.
Current fuel consumption
You can use this information to adapt your driving style to the desired fuel
consumption 1)
.
The display appears in litres/hour if the vehicle is stationary or driving at a low
speed 2)
.
Oil temperature
If the engine oil temperature is in the range of 80-110 °C, the engine operating
temperature has been reached.
If the oil temperature is lower than 80 °C or above 110 °C, avoid high engine
revs, full throttle and high engine loads.
If the oil temperature is lower than 50 °C or if there is a fault in the system for
checking the oil temperature are displayed instead of the oil temperature.
Warning against speeding
Set the speed limit, e.g. for the maximum permissible speed in towns
» page 47 .
Current driving speed
The current speed display is identical to the display on the speedometer 3
» Fig. 20 on page 30 or » Fig. 21 on page 30 .
Average speed
The average speed since the memory was last erased is displayed in km/hour .
Set the memory to zero at the start of measurement to determine the average
speed over a certain period » page 46.
After erasing the memory, no data will appear for the first 300 m driven.
The indicated information is updated continuously while you are driving.
Distance travelled
The distance travelled since the memory was last erased is displayed.
Reset the memory to zero if you want to measure the distance travelled from
a particular moment » page 46.
The maximum distance indicated is 9,999 km. The indicator is automatically
set back to zero if this period is exceeded.
Driving time
The time travelled since the memory was last erased is displayed.
If you want to measure the time travelled from a particular moment in time,
reset the memory to zero at that point in time » page 46.
The maximum distance indicated is 99 hours and 59 minutes. The indicator is
automatically set back to zero if this period is exceeded.
Coolant temperature
If the engine oil temperature is in the range 80-110 °C, the engine operating
temperature is reached.
If the temperature lies below 80 °C or above 110 °C, avoid high engine revs, full
throttle and high engine loads.
Warning at excessive speeds
Read and observe
on page 45 first.
The system allows you to set a speed limit and when this is reached, an acous-
tic warning signal sounds.
The following warning message is shown in the display. Speed … km exceeded.
SPEED TOO HIGH
Adjust the speed limit while the vehicle is stationary
›
Select the menu item Warning at (
) or
(
).
›
Activate the speed limit option by confirming this menu item.
›
Set the desired speed limit, e.g. 50 km/h.
1)
The units for the displayed consumption are set in the Infotainment
» Infotainment operating instruc-
tions , chapter Device settings .
2)
On some models in certain countries, the display appears in --,- kilometres/litres if the vehicle is station-
ary.
47Information system
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 or additional heating (auxiliary heat-
ing), 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 176 .
Replacing
Read and observe
and on page 158 first.
The new vehicle battery must have the same capacity, voltage, current and the
same size as the original battery. Suitable vehicle battery types can be pur-
chased from a specialist garage.
We recommend that the battery is 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 or reconnecting
Read and observe
and on page 158 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 / deviceOperating measureElectric window levers» page 58RadioEnter code » operating instruc-
tions for the Infotainment dis-
play radioTime settings» page 33
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 158 first.
The vehicle voltage control unit automatically prevents the battery from dis-
charging when the battery is subjected to heavy loads. This may be noticed
from the following.
› The idling speed is raised to allow the generator to deliver more electricity to
the electrical system.
› Where appropriate large convenience consumers, e.g. seat heaters, rear win-
dow heaters, have their power limited or shut off completely if necessary.
160General Maintenance
