On-board computer and displays, Display messages – Mercedes-Benz 2013 GLS Class User Manual
Page 291
Display messages
Possible causes/consequences and M Solutions
_
Rear left seat
backrest not
locked
or
Rear
right seat back‐
rest not locked
The backrest in the rear is not engaged on the left-hand and/or
right-hand side. A warning tone also sounds.
X
Push the backrest back until it engages.
_
Front left seat
backrest not
locked
or
Front
right seat back‐
rest not locked
The driver's or front-passenger seat backrest is not engaged. A
warning tone also sounds.
X
Push the backrest back until it engages.
j
Check trailer
hitch lock
The trailer tow hitch is not correctly engaged.
A warning tone also sounds.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X
Apply the parking brake.
X
Engage the trailer coupling's ball coupling in the end position
(
&
inoperative Bat‐
tery weak
The on-board voltage is too low. The auxiliary heating has switched
itself off or cannot be switched on (
X
Drive for a longer distance.
The battery is being charged. The auxiliary heating is operational
again as soon as the on-board electrical system voltage is suf-
ficient.
&
inoperative Refuel
vehicle
There is too little fuel in the fuel tank. The auxiliary heating cannot
be switched on (
X
Refuel at the nearest filling station.
&
inoperative See
Owner's Man.
The auxiliary heating has a temporary malfunction or is faulty.
X
When the vehicle is on a level surface and the engine has cooled
down, make up to four attempts to switch on the auxiliary heat-
ing, waiting several minutes between each attempt
(
X
If the auxiliary heating does not switch on, consult a qualified
specialist workshop.
Display messages
289
On-board computer and displays
Z