2019 MERCEDES-BENZ GLS engine

Warning/
indicator
lamp
0051
0051 Signal type
Possible causes/consequences and 0050 0050Solutions 00490024
0051
0049 (USA only), 0024(Canada only): the red indicator lamp for the electric
parking brake flashes or is lit and/or the yellow warning lamp for the electric
parking brake is lit.
X Observe the additional display messages in the multifunction display. 0075
0051
The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Observe the additional display messages in the multifunction display.
X Drive on carefully.
X Contact a qualified specialist workshop and have the restraint system checked.
For further information about the restraint system, see (Y page 44).Engine
Warning/
indicator
lamp
0051
0051 Signal type
Possible causes/consequences and 0050 0050Solutions 00B9
0051
The yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with gasoline engines)
R in the fuel system
The emission limit values may be exceeded and the engine may be in emergency mode.
X Visit a qualified specialist workshop immediately.
In some states, you must immediately visit a qualified specialist workshop as soon as the yellow Check Engine warning lamp lights up. This is due to the legal require-
ments in effect in these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving. 00B6
0051
The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. 282
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
0051 0051
Signal type
Possible causes/consequences and 0050
0050Solutions 00B6
0051
The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the 00B9Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler cap.
X If the fuel filler cap is closed: visit a qualified specialist workshop.00AC
0051
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gage is at the start of the scale.
The temperature sensor for the coolant temperature gage is malfunctioning.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
X Secure the vehicle against rolling away (Y page 158).
X Consult a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
283On-board computer and displays Z

Warning/
indicator
lamp
0051
0051 Signal type
Possible causes/consequences and 0050 0050Solutions 00AC
0051
The red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooled sufficiently.
X Observe the additional display messages in the multifunction display.
X Pull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 158).
X Leave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page 324).
X If you have to add coolant frequently, have the engine cooling system checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
X Do not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine could be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic. 00AC
0051
The red coolant warning lamp comes on while the engine is running.
The coolant temperature has exceeded 248 ‡ (120 †). The airflow to the engine radiator may be blocked or the coolant level may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur just by opening the hood.
There is a risk of injury.
X Observe the additional display messages in the multifunction display.
X Pull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 158).
X Leave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page 324).
X If you have to add coolant frequently, have the engine cooling system checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice. 284
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
0051 0051
Signal type
Possible causes/consequences and 0050
0050Solutions X
At coolant temperatures below 248 ‡ (120 †), drive to the nearest qualified
specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic. Driving systems
Warning/
indicator
lamp
0051 0051
Signal type
Possible causes/consequences and 0050
0050Solutions 00BA
0051
The red distance warning lamp lights up while the vehicle is in motion. A warning
tone also sounds.
You are approaching a vehicle, a pedestrian or a stationary obstacle in your line of travel at too high a speed.
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to brake or take
evasive action.
Further information about Active Distance Assist DISTRONIC (Y page 172).
Further information on the distance warning function of Active Brake Assist
(Y page 67).
Further information on the distance warning function of Active Brake Assist with
cross-traffic function (Y page 72). Warning and indicator lamps in the instrument cluster
285On-board computer and displays Z

Stowage areas
Loading guidelines
G
WARNING
If objects, luggage or loads are not secured or not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey. G
DANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the tail- gate is open while the engine is running, espe-cially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the tailgate. Never drive with the tailgate
open. G
WARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of burns.
Always be particularly careful and supervise
children closely around the exhaust pipe and
the exhaust pipe trims. Allow these compo-
nents to cool down before touching them.
The gross vehicle weight (GVW) is the vehicle
weight including fuel, vehicle tool kit, spare
wheel, installed accessories, vehicle occupants and luggage/cargo.
Do not exceed the load limit or permitted grossvehicle weight rating (GVWR) for your vehicle.
The gross load limit and the GVWR are specified
on the vehicle identification plate on the B-pillar
of the driver's door (Y page 362).
The load must also be distributed so that the
weight on each axle never exceeds the gross
axle weight rating (GAWR) for the front and rear axles. The specifications for GVWR and GAWR
are on the vehicle identification plate on the B-
pillar of the driver's door (Y
page 362).
Observe the notes on loading the vehicle
(Y page 362).
The handling characteristics of a laden vehicle
are dependent on the distribution of the load
within the vehicle. For this reason, you should
observe the following notes when transporting a
load:
R Never exceed the maximum permissible
gross vehicle mass or the gross axle weight
rating for the vehicle (including occupants).
R The cargo compartment is the preferred place
to carry objects.
R Position heavy loads as far forward as possi-
ble and as low down in the cargo compart-
ment as possible.
R The load must not protrude above the upper
edge of the seat backrests.
R Always place the load against the rear or front
seat backrests. Make sure that the seat
backrests are securely locked into place.
R Always place the load behind unoccupied
seats if possible.
R Use the cargo tie-down rings and the parcel
nets to transport loads and luggage.
R Use cargo tie-down rings and fastening mate-
rials appropriate for the weight and size of the load.
R Secure the load with sufficiently strong and
wear-resistant tie-downs. Pad sharp edges for
protection. Stowage spaces
Important safety notes G
WARNING
If you transport objects in the vehicle interior and these are not adequately secured, they
could slip or be flung around and thereby
strike vehicle occupants. In addition, cup
holders, open stowage spaces and mobile
phone brackets may not always be able to
hold the objects placed in them in the event of an accident. There is a risk of injury, particu-
larly in the event of sharp braking or sudden
changes of direction. Stowage areas
295Stowage and features
Z

Vehicles without a Rear Seat Entertainment Sys-
tem have an ashtray in the center console in the rear compartment.
X To open: briefly press cover 0044at the top.
The ashtray opens.
X To remove the insert: push into recess0087
from the right.
Ashtray insert 0043slides out slightly to the
right.
X Lift insert 0043up and out.
X To re-install the insert: place insert0043into
the holder and press down on the right until it
engages. Cigarette lighter
G
WARNING
You can burn yourself if you touch the hot
heating element or the socket of the cigarette lighter.
In addition, flammable materials can ignite if:
R the hot cigarette lighter falls
R a child holds the hot cigarette lighter to
objects, for example
There is a risk of fire and injury.
Always hold the cigarette lighter by the knob.
Always make sure that the cigarette lighter is
out of reach of children. Never leave children unsupervised in the vehicle.
! The cigarette lighter in the center console in
the front compartment is not intended for
operating the tire inflation compressor. Your attention must always be focused on the
traffic conditions. Only use the cigarette lighter
when road and traffic conditions permit. X
Turn the SmartKey to position 0048in the igni-
tion lock (Y page 140).
X To open: slide cover 0043to its foremost posi-
tion.
X Press in cigarette lighter 0044.
Cigarette lighter 0044will pop out automatically
when the heating element is red-hot.
X To close: pull cover 0043back as far as it will go. 12 V sockets
General notes X
Turn the SmartKey to position 0047in the igni-
tion lock (Y page 140).
With the exception of the socket in the front
center console, all sockets can be used for
accessories with a maximum current draw of
240 W (20 A). The socket in the front center
console can be used for accessories with a max-
imum current draw of 180 W(15 A). Accessories
include such items as chargers for mobile
phones.
If you use the sockets for long periods when the engine is switched off, the battery may dis-
charge.
i An emergency cut-out ensures that the on-
board voltage does not drop too low. If the on-
board voltage is too low, the power to the
sockets is automatically cut. This ensures
that there is sufficient power to start the
engine.
Socket in the front center console !
The socket is not suitable for operating the
tire inflation compressor.
X To open: slide the cover to its foremost posi-
tion.
X Lift up the cover of the socket.
X To close: pull the cover back as far as it will
go.
Socket in the rear passenger compart-
ment center console Vehicles with the Rear Seat Entertainment Sys-
tem have two sockets in the center console in
the rear passenger compartment.
X Lift up the cover of the socket. Features
307Stowage and features Z

Problems with the 115 V power socket
Problem
Possible causes/consequences and
0050
0050Solutions The warning lamp on the
115 V power socket is
not lit. The on-board voltage is too low because the battery is too weak.
X Start the engine.
or X Charge the battery (Y page 342).
If the indicator lamp still does not light up: X Visit a qualified specialist workshop. The temperature of the DC/AC converter is temporarily too high.
X Remove the electronic device connector from the 115 V socket.
X Let the DC/AC converter cool down.
If the indicator lamp still does not light up after cooling down the
converter:
X Visit a qualified specialist workshop. You have connected an electronic device that has a constant nominal
power of less than 150 watts, but has a very high switch-on current.
This device will not work. If you connect such a device, the 115 V
power socket will not supply it with power.
X Connect a suitable electronic device. mbrace
General notes The mbrace system is only available in the USA.
A license agreement must be in place in order to
activate the mbrace service. Make sure that
your system is activated and operational. To
register, press the 00D9Info call button. If any of
the steps mentioned are not carried out, the
system may not be activated.
If you have questions about the activation, con- tact one of the following telephone hotlines:
Mercedes-Benz Customer Assistance Center at
1-800 FOR-MERCEDES (1-800-367-6372) or
1-866-990-9007
Shortly after successfully registering with the
mbrace service, a user ID and password will be
sent to you by mail. You can use this password
to log onto the mbrace area under "Owners
Online" at http://www.mbusa.com. The system is available if:
R it has been activated and is operational
R the corresponding mobile phone network is
available for transmitting data to the Cus-
tomer Center
R a service subscription is available
Determining the location of the vehicle on a map
is only possible if:
R GPS reception is available
R the vehicle position can be forwarded to the
Customer Assistance Center
The mbrace system To adjust the volume during a call, proceed as
follows:
X Press the 0081or0082 button on the multi-
function steering wheel.
or X Use the multimedia system volume control. Features
309Stowage and features Z

The data you receive contains the following
information:
R the location where the speed limit was excee-
ded
R the time at which the speed limit was excee-
ded
R the selected speed limit which was exceeded
Geo fencing Geo fencing allows you to select areas which the
vehicle should not enter or leave. You will be
informed if the vehicle crosses the boundaries
of the selected areas. You can select the way in which you receive this information beforehand.
Possible options include text message, e-mail or an automated call.
The area can be determined as either a circle or
a polygon with a maximum of ten corners. You
can specify up to ten areas simultaneously. Dif- ferent settings are possible for each area.
These settings can be called up under "Owners
Online" at http://www.mbusa.com.
Alternatively, you can also trigger an Info call
and notify the customer service representative
that you wish to activate geo-fencing.
Currently inactive areas can be activated by text
message.
Triggering the vehicle alarm With this function, you can trigger the vehicle's
panic alarm via text message. An alarm sounds
and the exterior lighting flashes. Depending on
the setting, the panic alarm lasts five or ten sec-
onds. Afterwards, the alarm switches off. Garage door opener
General notes The HomeLink
®
garage door opener integrated
in the rear-view mirror allows you to operate up to three different door and gate systems.
Use the integrated garage door opener only on
garage doors that:
R they are equipped with a safety stop and
reverse feature
R they conform to the current U.S. safety stand-
ards When it has been programmed, the integrated
garage door opener in the rear-view mirror will
assume the function of the garage door sys-
tem's remote control. Please also read the oper-
ating instructions for the garage door system.
When programming a garage door opener, park the vehicle outside the garage. Do not leave the
engine running while programming.
Certain garage door drives are incompatible
with the integrated garage door opener. If you
have difficulty programing the integrated garage
door opener, contact a Mercedes-Benz Service
Center.
Alternatively, you can call the following tele-
phone assistance services:
R USA: Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
R Canada: Customer Service at
1-800-387-0100
R HomeLink ®
hotline 1-800-355-3515 (free of
charge)
More information on HomeLink ®
and/or com-
patible products is also available on the Internet
at http://www.homelink.com.
Notes on the declaration of conformity
(Y page 30).
USA: FCC ID: CB2HMIHL4
Canada: IC: 279B-HMIHL4
Important safety notes G
WARNING
When you operate or program the door with
the integrated garage door opener, persons in the range of movement of the door may
become trapped or be struck by the door.
There is a risk of injury.
When using the integrated garage door
opener, always make sure that nobody is
within the range of movement of the door. G
DANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and can result in poisoning. There is a risk of
fatal injury. Therefore, never leave the engine running an enclosed space without adequate
ventilation. 316
FeaturesStowage and features