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Instruments and controls105Tachometer
Displays the engine speed.
Drive in a low engine speed range for each gear as much as possible.
Caution
If the needle is in the red warning
zone, the maximum permitted
engine speed is exceeded. Engine at risk.
Fuel gauge
Displays the fuel level or gas content
(CNG) in the tank depending on the current operation mode.
The arrow indicates the vehicle side
where the fuel filler flap is located.
For bi-fuel engines, the Driver
Information Centre displays the fuel l
evel for the fuel type which is currently
not in operation. The fuel level for the fuel type which is currently in
operation is shown in the fuel gauge.
Control indicator r illuminates if the
fuel quantity is low.
For bi-fuel engines: In petrol mode, the control indicator r illuminates
before the needle reaches the red
area.
Refuel immediately if r flashes.
Never run the fuel tank dry.
Because of the fuel remaining in the
tank, the top-up quantity may be less
than the specified fuel tank capacity.
Fuel selector
Natural gas operation (CNG)
Press X to switch between petrol and
natural gas operation.
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132Instruments and controlsSOS button
Press [ to establish a priority
emergency connection to a specially
trained emergency advisor.
Status LED
Green: The system is ready with activated transmission of the vehicle
location.
Green flashing: The system is on a call.
Red: A problem arose.
Off: The system is ready with
deactivated transmission of the
vehicle location or the system is in
standby mode.
Red / green flashing for a short period of time: The transmission of the
vehicle location has been
deactivated.
OnStar services
General services
If you need any information e.g.
opening hours, points of interest and
destinations or if you need any
support e.g. in the case of a vehiclebreakdown, a flat tyre and empty fuel
tank, press Z to establish a
connection to an advisor.
Emergency services
In the case of an emergency situation,
press [ and talk to an advisor. The
advisor then contacts emergency or
assistance service providers and
directs them to your vehicle.
In the case of an accident with
activation of airbags or belt
tensioners, an automatic emergency
call is established. The advisor is
immediately connected to your
vehicle to see whether help is
needed.
Wi-Fi hotspot
The Wi-Fi hotspot of the vehicle
provides internet connectivity with a
maximum speed of 4G/LTE.
Note
The Wi-Fi hotspot functionality is not available for all markets.
Note
Some mobile devices connect to Wi- Fi hotspots automatically and use
mobile data capacity in thebackground, even if they are not in
use. This includes automatic
updates, downloads, as well as
programme or app synchronisation
traffic. The data volume purchased
via OnStar might be consumed
rapidly. Turn off automatic
synchronisations in the settings of
your device.
Up to seven devices may be connected.
To connect a mobile device with the
Wi-Fi hotspot:
1. Press j and then select Wi-Fi
settings on the Info-Display. The
settings displayed include the Wi- Fi hotspot name (SSID),
password and connection type.
2. Start a Wi-Fi network search on your mobile device.
3. Select your vehicle hotspot (SSID) when listed.
4. When prompted, enter the password on your mobile device.
Page 225 of 317

Driving and operating223Natural gas refuelling
The fuel filler flap can only be opened
if the vehicle is unlocked. Release the
fuel filler flap by pushing the flap.
9 Warning
Refuel only with a maximum
output pressure of 250 bar. Use
only temperature-compensated
filling stations.
The refuelling procedure must be
completed, i.e. the filler neck must be
vented.
The capacity of the natural gas tank depends on outside temperature,
filling pressure, gas composition and
type of refuelling system. Capacities
3 294.
Close the flap and allow it to engage. Terms for "natural gas vehicles"
abroad:GermanErdgasfahrzeugeEnglishNGVs = Natural Gas Vehi‐
clesFrenchVéhicules au gaz naturel -
or - Véhicules GNVItalianMetano auto
Terms for "natural gas" abroad:
GermanErdgasEnglishCNG = Compressed
Natural GasFrenchGNV = Gaz Naturel (pour)
Véhicules - or -
CGN = carburantgaz
naturelItalianMetano (per auto)Fuel filler cap
Only use genuine fuel filler caps. Diesel-engined vehicles have special fuel filler caps.