2015 MERCEDES-BENZ GL-Class trailer

R
brake sharply
R change direction suddenly
R are involved in an accident Trailer power supply
! You can connect accessories with a max-
imum power consumption of 240 W to the
permanent power supply.
You must not charge a trailer battery using
the power supply.
The trailer socket of your vehicle is equipped at the factory with a permanent power supply.
The permanent power supply is supplied via
trailer socket pin 4.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
A qualified specialist workshop can provide
more information about installing the trailer
electrics. Towing a trailer
271Driving and parking Z

Safety systems
Display messages
Possible causes/consequences and
0050
0050Solutions 002500E5
Currently Unavail‐ Currently Unavail‐
able See Opera‐ able See Opera‐
tor's Manual tor's Manual ABS (Anti-lock Braking System), ESP
®
(Electronic Stability Pro-
gram), BAS (Brake Assist), PRE-SAFE ®
, the HOLD function, hill
start assist, crosswind assistance and ESP ®
trailer stabilization
are temporarily unavailable.
COLLISION PREVENTION ASSIST, BAS PLUS and
PRE‑SAFE ®
Brake may also have failed.
In addition, the 00E5,00BBand0025 warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes are:
R Self-diagnosis is not yet complete.
R The on-board voltage may be insufficient.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed: X Drive on carefully.
X Visit a qualified specialist workshop. 002500E5
Inoperative See Inoperative See
Operator's Manual Operator's Manual ABS, ESP
®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist,
crosswind assistance and ESP ®
trailer stabilization are unavailable
due to a malfunction.
COLLISION PREVENTION ASSIST, BAS PLUS and
PRE‑SAFE ®
Brake may also have failed.
The 0027 (USA only)/004D (Canada only),00E5,00BBand0025
warning lamps in the instrument cluster also light up.
ATTENTION ASSIST is deactivated.
G WARNING Display messages
293On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec- ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 00E5
Currently Unavail‐ Currently Unavail‐
able See Opera‐ able See Opera‐
tor's Manual tor's Manual ESP
®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist, cross-
wind assistance and ESP ®
trailer stabilization are unavailable due
to a malfunction.
COLLISION PREVENTION ASSIST, BAS PLUS and
PRE ‑SAFE ®
Brake may also have failed.
In addition, the 00E5and00BB warning lamps light up in the
instrument cluster.
The self-diagnosis function might not be complete, for example.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you
brake hard, for example.
The braking distance in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit a qualified specialist workshop. 294
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 00E5
Inoperative See Inoperative See
Operator's Manual Operator's Manual ESP
®
, BAS, PRE-SAFE ®
, the HOLD function, hill start assist, cross-
wind assistance and ESP ®
trailer stabilization are unavailable due
to a malfunction.
COLLISION PREVENTION ASSIST, BAS PLUS and
PRE ‑SAFE ®
Brake may also have failed.
In addition, the 00E5and00BB warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you
brake hard, for example.
The braking distance in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop. 007A0025
00E5
Inoperative See Inoperative See
Operator's Manual Operator's Manual EBD (electronic brake force distribution), ABS, ESP
®
, BAS, PRE-
SAFE ®
, the HOLD function, hill start assist, crosswind driving
assistance and ESP ®
trailer stabilization are unavailable due to a
malfunction.
COLLISION PREVENTION ASSIST, BAS PLUS and
PRE ‑SAFE ®
Brake may also have failed.
In addition, the 00E5,00BBand0025 warning lamps light up in the
instrument cluster and a warning tone sounds.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. Display
messages
295On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIR BAG OFF indicator
lamp remains lit or goes out depends on how OCS classifies the
occupant.
If the conditions are not fulfilled, the system is not operating cor- rectly.
X Visit a qualified specialist workshop immediately. Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Display messages
Possible causes/consequences and
0050 0050Solutions 0049
Check Left Corner‐ Check Left Corner‐
ing Light ing Light
orCheck
Check
Right Cornering
Right Cornering
Light Light The left or right-hand cornering light is defective.
X Visit a qualified specialist workshop. 0049
Check Left Low Check Left Low
Beam Beam
orCheck
Check
Right Low Beam
Right Low Beam The left or right-hand low-beam headlamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 138).
or
X Visit a qualified specialist workshop. 0049
Check Check
Trailer
Trailer Left
Left
Turn Signal
Turn Signal or
Check Trailer
Check Trailer
Right Turn Signal Right Turn Signal The left or right-hand trailer turn signal lamp is defective.
X Observe the separate operating instructions provided by the
trailer manufacturer. 0049
Check Rear Left Check Rear Left
Turn Signal Turn Signal
or
Check Rear Right
Check Rear Right
Turn Signal Turn Signal The rear left-hand or rear right-hand turn signal is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 138).
or
X Visit a qualified specialist workshop. Display
messages
305On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Check Front Left Check Front Left
Parking Lamp Parking Lamp
or
Check Front Right
Check Front Right
Parking Lamp Parking Lamp The front left or front right parking or standing lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 138).
or
X Visit a qualified specialist workshop. 0049
Backup Light Backup Light The backup lamp is defective.
X Visit a qualified specialist workshop. 0049
Check Front Left Check Front Left
Sidemarker Lamp Sidemarker Lamp
or
Check Front Right
Check Front Right
Sidemarker Lamp Sidemarker Lamp The left or right front side marker lamp is defective.
X Visit a qualified specialist workshop. 0049
Check Left Tail Check Left Tail
Lamp Lamp
orCheck
Check
Right Tail Lamp
Right Tail Lamp The left or right-hand tail lamp is defective.
or
The rear left or right side marker lamp is defective.
X Visit a qualified specialist workshop. 0049
Check Check
Left
LeftDaytime
Daytime
Running Light
Running Light or
Check Right Day‐
Check Right Day‐
time Running Light time Running Light The left-hand or right-hand daytime running lamp is faulty.
X Visit a qualified specialist workshop. 0049
Active Light Sys‐ Active Light Sys‐
tem Inoperative tem Inoperative The active light function is defective.
X Visit a qualified specialist workshop. 0049
Malfunction See Malfunction See
Operator's Manual Operator's Manual The exterior lighting is defective.
X Visit a qualified specialist workshop. Vehicles with trailer tow hitch: a fuse may have blown.
X Check the fuses (Y page 402).
X If necessary, replace the blown fuse. Observe the warning notes.
If the display message continues to be displayed: X Visit a qualified specialist workshop. Display
messages
307On-board computer and displays Z

Driving systems
Display messages
Possible causes/consequences and
0050
0050Solutions 00AD
Attention Assist: Attention Assist:
Take a Break! Take a Break! Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. A warning tone also sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get enough rest. 00AD
Attention Assist Attention Assist
Inoperative Inoperative ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop. 00C4
Drive More Slowly Drive More Slowly You cannot change the vehicle level. Possible causes are:
R you are driving too fast for the selected vehicle level.
R you are towing a trailer.
R the trailer-coupling socket is being used, e.g. for a bicycle rack.
X Drive more slowly and then select the desired vehicle level
again.
R Vehicles with the ON&OFFROAD package (Y page 214)
R Vehicles with the AIRMATIC package (Y page 221)
X Observe the notes on towing a trailer (Y page 265).00C4
Compressor Compressor
Is
IsCool‐
Cool‐
ing
ing You have selected a higher vehicle level. The compressor first
needs to cool down because of frequent level changes.
X Drive in a manner appropriate for the current vehicle level.
X Make sure that there is sufficient ground clearance.
X Allow the compressor to cool down.
When the compressor has cooled down, the display message
disappears. The vehicle then continues rising to the selected
level. 00C4
ABC Malfunction ABC Malfunction AIRMATIC is malfunctioning.
X
Drive as appropriate for the current vehicle level, but do not
exceed 50 mph (80 km/h).
X Make sure that there is sufficient ground clearance.
X Have the vehicle checked at a qualified specialist workshop. 312
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions Blind Spot Assist
Blind Spot Assist
Currently Unavail‐ Currently Unavail‐
able See Opera‐ able See Opera‐
tor's Manual tor's Manual
or
Active Blind Spot
Active Blind Spot
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Blind Spot Assist or Active Blind Spot Assist is temporarily inop-
erative. Possible causes are:
R the sensors are dirty.
R function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
The yellow 0063indicator lamps also light up in the exterior mir-
rors.
When the causes stated above no longer apply, the display mes-
sage disappears.
Blind Spot Assist or Active Blind Spot Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 190).
X Clean the sensors (Y page 381).
X Restart the engine. Blind Spot Assist or Active Blind Spot Assist is deactivated while
towing a trailer.
You have established the electrical connection between the trailer
and your vehicle.
X Press 0076on the steering wheel to confirm the display mes-
sage. Blind Spot Assist Blind Spot Assist
Inoperative Inoperative
or
Active Blind Spot
Active Blind Spot
Assist Inoperative Assist Inoperative Blind Spot Assist or Active Blind Spot Assist is defective.
The yellow
0063indicator lamps also light up in the exterior mir-
rors.
X Visit a qualified specialist workshop. Park Assist Can‐ Park Assist Can‐
celed celed The driver's door is open and the driver's seat belt has not been
fastened.
X Repeat the parking process with the seat belt fastened and the
driver's door closed. You have inadvertently touched the multifunction steering wheel
while steering intervention was active.
X While steering intervention is active, make sure that the multi-
function steering wheel is not touched unintentionally. 316
Display
messagesOn-board computer and displays