2019 MERCEDES-BENZ SL CLASS warning

Safety systems
Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
'MQ'(USA only),M(Canada only): the red brake system warning lamp islit while the engine is running.
A warning tone also sounds.
GWARNING
The brake boosting effect is malfunctioning and the braking characteristics maybe affected.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention toroad and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 146).
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
'MQ'(USA only) orM(Canada only): the red brake system warning lampis lit while the engine is running. A warning tone also sounds.
GWARNING
There is not enough brake fluid in the brake fluid reservoir.
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention toroad and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 146).
XDo not add brake fluid. Adding more will not correct the malfunction.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
'QUSA only: the red brake system warning lamp is lit while the engine is run-ning. The multifunction display also shows a display message with the&symbol.
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
Warning and indicator lamps235
On-board computer and displays
Z

Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
%QThe yellow ABS warning lamp is lit while the engine is running.
ABS (anti-lock braking system) is malfunctioning.
If there is an additional warning tone, the EBD (electronic brake force distribu-tion) is malfunctioning.
Other driving systems and driving safety systems may also malfunction.
GWARNING
The brake system continues to function normally, but without the functions lis-ted above. The front and rear wheels could therefore lock if you perform a fullbrake application, for example.
The steerability and braking characteristics may be severely affected. The brak-ing 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.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If the ABS control unit is defective, there is also a possibility that other systems,such as the navigation system or the automatic transmission, will not be availa-ble.
'M

Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions

Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
tQMercedes-AMG vehicles only:
The yellow SPORT handling mode warning lamp is lit while the engine is running.
SPORT handling mode is activated.
GWARNING
When SPORT handling mode is switched on, ESP®is unable to stabilize the vehi-cle.
There is an increased risk of skidding and an accident.
XOnly switch to SPORT handling mode in accordance with the conditions
described in the "Activating/deactivating ESP®" section (Ypage 68).
I$QI(USA only),$(Canada only): the red indicator lamp for the electricparking brake flashes or is lit and/or the yellow warning lamp for the electricparking brake is lit.
XObserve the additional display messages in the multifunction display.
uQThe red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
GWARNING
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.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XContact a qualified specialist workshop and have the restraint systemchecked.
For further information about the restraint system, see (Ypage 41).
238Warning and indicator lamps
On-board computer and displays

Engine
Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions

Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions

Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
XMake sure that the air supply to the engine radiator is not blocked, e.g. bysnow, slush or ice.
XIf the coolant temperature gage is below theHmarking (Ypage 191), driveon to the next qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous ter-rain and stop-and-go traffic.
Driving systems
Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions

Tires
Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
wQThe yellow tire pressure monitor warning lamp (pressure loss/malfunction) islit.
The tire pressure monitor has detected a loss of pressure in at least one of thetires.
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase
Rthey may wear excessively and/or unevenly, which may greatly impair tiretraction.
Rthe driving characteristics, as well as steering and braking, may be greatlyimpaired
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking maneuvers.Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 146).
XObserve the additional display messages in the multifunction display.
XCheck the tires and, if necessary, follow the instructions for a flat tire(Ypage 278).
XCheck the tire pressure (Ypage 299).
XIf necessary, correct the tire pressure.
wQThe yellow tire pressure monitor warning lamp (pressure loss/malfunction)flashes for approximately one minute and then remains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident.
XObserve the additional display messages in the multifunction display.
XVisit a qualified specialist workshop immediately.
242Warning and indicator lamps
On-board computer and displays