MERCEDES-BENZ S-CLASS SALOON LONG 2022 Owners Manual

Display messages
Possible causes/consequences and P Solutions 
If the ball neck has been extended: initiat e a new swivel movement ( page 333).
The ball neck will engage beneath the bumper.
If the display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not locked. 
Do not couple up the trailer. Drive on without the trailer. Note the reduced ground clearance due to the unlocked
ball nec
k. 
Consult a q
ualiNed specialist workshop.
Please teach in trailer cou-
pling again using the but-
ton in load compartment
Wait for it to extend/
retract * The swivel movement of the trailer hitch is impaired. 
Use the button on the boot lid to trigger a new, complete swivel movement until the ball neck engages beneath the
bum

per.
Head-up display currently
unavailable See Owner's
Manual * The head-up display is temporarily unavailable. Possible causes:
= malfunctions in t

he power supply
= signal interference 
Stop in accordance with the tr
aPc conditions and switch the vehicle oM and on again. 
If the display message still appears, consult a q
ualiNed specialist workshop.
Head-up display inoperative * The head-up display has an internal error. 
Consult a q
ualiNed specialist workshop.528
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and P Solutions
Head-up display Brightness
currently reduced See Own-
er's Manual * The brightness of the head-up display is reduced. Possible causes:
= Dir
t on the windscreen in the camera's Neld of vision
= Faulty exterior brightness signals 
Switch on the windscreen wipers. 
Clean the windscreen if necessary. 
Switch the vehicle oM and switc
h it back on 
If the display message still appears, consult a q
ualiNed specialist workshop.
Ù
Steering malfunction Drive
carefully Visit workshop * A power steering malfunction has occurred. Steering characteristics may be impaired as a result. 
Drive on carefully. 
Consult a q
ualiNed specialist workshop.
Ù
Steering malfunction
Increased physical effort
See Owner's Manual * The power steering assistance is malfunctioning. &
WARNING Risk of an accident due t
o altered steering characteristics
If the power assistance of the steering fails partially or completely, you will need to use more force to steer. 
If safe steering is possible, drive on carefully. 
Visit or consult a q
ualiNed specialist workshop immediately. Display messages and warning/indicator lamps
529

Display messages
Possible causes/consequences and P Solutions
Ù
Steering malfunction Stop
immediately See Owner's
Manual * The steering is malfunctioning. Steering capability is
signiNcantl y impaired. &
WARNING Risk of accident if s
teering capability is impaired
If the steering does not function as intended, the vehicle's operating safety is jeopardised. 
Pull over and stop the vehicle safely as soon as possible, paying attention to road and tr
aPc conditions. Do
not continue driving under any circumstances. 
Consult a q
ualiNed specialist workshop.Ù
Rear axle steering cur-
rently malfunctioning * The rear-axle steering is temporarily unavailable. The turning circle may become wider. 
Stop the vehicle in accordance with the tr
aPc conditions and restart the vehicle.
If the display message does not disappear: 
Drive on carefully. 
Consult a q
ualiNed specialist workshop.
Ù
Rear axle steering Malfunc-
tion Visit workshop * The rear axle steering is malfunctioning.
The r
ear axle has no steering capability.
The steering wheel may be at an angle when you drive in a straight line. 
Adapt your speed and drive on carefully. 
Consult a q
ualiNed specialist workshop immediately.530
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and P Solutions
Ù
Rear axle steering Malfunc-
tion Stop immediately * The rear axle steering is malfunctioning.
The r ear axle has no steering capability.
The steering wheel may be tilted considerably when you drive in a straight line.
Depending on the steering wheel's tilted position, the steering wheel will also vibrate and a continuous warning tone
will sound. &
WARNING Risk of accident if s
teering capability is impaired
If the steering does not function as intended, the vehicle's operating safety is jeopardised. 
Pull over and stop the vehicle safely as soon as possible, paying attention to road and tr
aPc conditions. Do
not continue driving under any circumstances. 
Consult a q
ualiNed specialist workshop. 
When stopping, bear the enlarged vehicle width in mind.
Snow chain mode Maxi-
mum speed exceeded * The maximum permissible speed for snow chain mode has been exceeded. 
Drive more slowly.
Active bonnet malfunction
See Owner's Manual * The active bonnet (pedestrian protection) is malfunctioning or inoperative
aser ha
ving already been triggered.
Consult a q
ualiNed specialist workshop.
Ambient light warning sup-
port inoperative * The ambient lighting may not provide full visual warning support. 
Lock the vehicle and unlock it again aser a f
ew minutes. Display messages and warning/indicator lamps
531

Display messages
Possible causes/consequences and P Solutions 
If the display message appears regularly, contact a q ualiNed specialist workshop.
Q * At least one door is open. 
Close all doors.
M Bonnet unlatched Pull lever
again to open * The bonnet is not fully unlocked. &
WARNING Risk of accident due t
o driving with the bonnet unlocked
The bonnet may open and block your view. 
Never release the bonnet when driving. 
Before every trip, ensure that the engine bonnet is locked. 
To open the bonnet fully, pull the handle again (  pag
e 429).
M
Bonnet not locked Close
before starting journey * The bonnet is not locked. &
WARNING Risk of accident due t
o driving with the bonnet unlocked
The bonnet may open and block your view. 
Never release the bonnet when driving. 
Before every trip, ensure that the engine bonnet is locked. 
Close the bonnet (  pag
e 429).532
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and P Solutions
M
Stop immediately Close
bonnet completely * The bonnet is not locked. &
WARNING Risk of accident due t o driving with the bonnet unlocked
The bonnet may open and block your view. 
Never release the bonnet when driving. 
Before every trip, ensure that the engine bonnet is locked. 
Stop the vehicle immediately in accordance with the tr
aPc conditions. 
Close the bonnet (  pag
e 429).
M * The bonnet is open. &
WARNING Risk of accident due t
o driving with the bonnet unlocked
The bonnet may open and block your view. 
Never release the bonnet when driving. 
Before every trip, ensure that the engine bonnet is locked. 
Stop the vehicle immediately in accordance with the tr
aPc conditions. 
Close the bonnet. Display messages and warning/indicator lamps
533

Display messages
Possible causes/consequences and P Solutions
N * The boot lid is open. &
DANGER Risk of e xhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter the vehicle
int
erior if the boot lid is open when the engine is running, especially if the vehicle is in motion. 
Always switch oM t
he engine before opening the boot lid. 
Never drive with the boot lid open. 
Close the boot lid.

Display messages
Possible causes/consequences and P Solutions 
Restart the vehicle.
If the display message still appears: 
Consult a qualiNed specialist workshop. Engine
Display messages
Possible causes/consequences and P Solutions
To switch off the vehicle,
press the Start/Stop but-
ton for at least 3 seconds
or 3 times * You have pressed the start/stop button while the vehicle is in motion. 
Information about switching oM t
he vehicle while driving ( page 210).
Cannot start vehicle See
Owner's Manual * The vehicle cannot be started. 
Switch the vehicle oM and switc
h it back on 
If the display message still appears, consult a q
ualiNed specialist workshop. Display messages and warning/indicator lamps
535

Display messages
Possible causes/consequences and P Solutions

Display messages
Possible causes/consequences and P Solutions 
Make sure that the air supply to the radiator is not obstructed. 
Avoiding high loads on the engine, drive to the nearest q ualiNed specialist workshop. In doing so, ensure that the
coolant temperature display remains below 120°C.