Mercedes-Benz A-CLASS SEDAN 2020 Warning and Indicator Lights User Manual
Introduction
Greetings from the Mercedes-Benz A-Class Sedan 2020 globe! Sophistication combines performance, and innovation meets style in this modern automobile engineering masterpiece. It’s important to become familiar with this vehicle’s cutting-edge features before you start your journey, especially the warning and indicator lights that will keep you informed and secure on every expedition. These sophisticated warning and indication lights act as your car’s communication system, providing crucial details about its performance, health, and potential problems. Understanding what each light means as a driver can be crucial for maintaining optimal operation and avoiding potential problems.
Each light, from the always vigilant check engine light to the tyre pressure monitor and different safety system indications, is made to give you real-time feedback and guarantee a safe and comfortable driving experience. Our goal is to arm you with knowledge and insight into the diagnostics of your A-Class Sedan so you can comfortably navigate the roads knowing your Mercedes-Benz is always operating at its peak performance. Join us as we explore the Mercedes-Benz A-Class Sedan 2020’s warning and indicator lights. Discover the significance and purpose of these glowing symbols so you may maximise the performance of your opulent vehicle while honouring the Mercedes-Benz history of excellence and innovation. Safe travels!
Warning and indicator lamps
Overview of indicator and warning lamps
Some systems will perform a self-test when the ignition is switched on. Some indicator and warning lamps may briefly light up or flash. This behavior is non-critical. These indicator and warning lamps indicate a malfunction only if they light up or flash after the engine has been star‐ted or during a journey.
Instrument Display (standard)
Widescreen Cockpit Instrument Display
Depending on the display setting, the positions of the indicator lamps on the Instrument Display may differ from the example shown.
Indicator and warning lamps:
Low beam
Parking lamps
High beam
Turn signal light
Rear fog light
Restraint system
Seat belt not fastened
USA: brakes (red)
Canada: brakes (red)
Electric parking brake (yellow)
USA: electric parking brake applied (red)- Canada: electric parking brake applied (red)
ABS malfunction
ESP®
ESP® OFF
Distance warning
Electric power steering malfunction
Check Engine
Electrical malfunction
Fuel reserve with fuel filler cap location indicator
Vehicles with a Widescreen Cock‐pit: coolant too hot or cold
Tire pressure monitor
Occupant safety
 Restraint system warning lamp |
The red restraint system warning lamp is lit while the engine is running.
*The restraint system is malfunctioning (/ page 35). & WARNING Risk of injury due to malfunctions in the restraint system If the restraint system is malfunctioning, restraint system components may be triggered unintentionally or may not deploy as intended during an accident. This may affect the Emergency Tensioning Devices or airbags, for example. # Have the restraint system checked and repaired immediately at a qualified specialist workshop. # Drive on carefully. # Note the messages on the multifunction display. # Consult a qualified specialist workshop immediately. |
Seat belt warning lamp flashes |
The red seat belt warning lamp flashes and an intermittent warning tone sounds.
*The driver or front passenger has not fastened their seat belt while the vehicle is in motion. # Fasten your seat belt(/ page 39). *There are objects on the front passenger seat. # Remove the objects from the front passenger seat. |
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
|
Seat belt warning lamp lights up |
The red seat belt warning lamp will light up for six seconds once the engine has started. In addition, a warning tone may sound.
*The seat belt warning lamp reminds the driver and front passenger to fasten their seat belts. # Fasten your seat belt (/ page 39). If you have placed objects on the front passenger seat, the seat belt warning lamp may remain lit. |
|
Vehicle |
|
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
Warning lamp for electric power steering |
The red electric power steering warning lamp is lit while the engine is running.
*The power-assisted steering or the steering itself is malfunctioning. & WARNING Risk of accident if steering capability is impaired If the steering does not function as intended, the vehicle’s operating safety is jeopardized. # Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances. # Consult a qualified specialist workshop. # Note the messages on the multifunction display. |
Engine
| Warning/indicator lamp | Possible causes/consequences and M Solutions | ||
| # | Consult a qualified specialist workshop. | ||
| or
# Exit the vehicle and keep a safe distance from it until the engine has cooled down. |
|||
|
|
The yellow Check Engine warning lamp is lit while the engine is running. *A malfunction has occurred in the engine, the exhaust system or the fuel system.The emission limit values may be exceeded and the engine may be in emergency mode. In some states, legal requirements stipulate that you must immediately consult a qualified specialist workshop as soon as the yellow Check Engine warning lamp lights up.
# Have the vehicle checked as soon as possible at a qualified specialist workshop. |
||
Electrical malfunction warn‐ ing lamp |
The red electrical malfunction warning lamp is lit. * There is a malfunction in the electrics. # Observe the messages on the multifunction display. |
||
Engine diagnosis warning lamp
Fuel reserve warning lamp |
The yellow fuel reserve warning lamp lights up while the engine is running. * The fuel supply has dropped into the reserve range. # Refuel. |
|
Fuel reserve warning lamp |
The yellow fuel reserve warning lamp lights up while you are driving. *There has been pressure loss in the fuel system. The fuel filler cap is not closed correctly or the fuel system is leak‐ ing.# Close the fuel filler cap. If the fuel filler cap has already been closed correctly: # Visit a qualified specialist workshop. |
Brakes
Red indicator lamp, electric parking brake applied (USA only)
Red indicator lamp, electric parking brake applied (Can‐ ada only)
Yellow electric parking brake indicator lamp is mal‐ functioning |
The red electric parking brake indicator lamp flashes or is lit. The yellow indicator lamp is also lit if the electric parking brake malfunctions.
* # Observe the messages on the multifunction display. |
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
|
Brake warning lamp (USA)
Brakes warning lamp (Can‐ ada) |
The red brake system warning lamp is lit while the engine is running.
*Possible causes: R The brake force boosting is malfunctioning and the braking characteristics may be affected. & WARNING Risk of accident and injury if brake force boosting is malfunctioning # Stop in a safe location immediately. Do not continue driving. & WARNING Risk of an accident due to low brake fluid level If the brake fluid level is too low, the braking effect and the braking characteristics may be impaired. |
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
| # Note the messages on the multifunction display.
# Consult a qualified specialist workshop. |
|
|
Driving systems |
|
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
|
Warning lamp for distance warning function |
The red distance warning lamp lights up while the vehicle is in motion. *The distance to the vehicle in front is too small for the speed selected. If there is an additional warning tone, you are approaching an obstacle at too high a speed.# Be prepared to brake immediately. # Increase the distance. Function of Active Brake Assist (/ page 164). |
Driving safety systems
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
|
|
The yellow ABS warning lamp is lit while the engine is running. *ABS is malfunctioning.If there is an additional warning tone, EBD is malfunctioning. Other driving systems and driving safety systems may also be malfunctioning. & WARNING There is a risk of skidding if EBD or ABS is malfunctioning If EBD or ABS is malfunctioning, the wheels may lock when braking.
The steering capability and braking characteristics are thus severely impaired. The braking distance in an emergency braking situation can increase. In addition, other driving safety systems are switched off. # Drive on carefully. |
ABS warning lamp
ESP® warning lamp flashes |
The yellow ESP® warning lamp flashes while the vehicle is in motion. * One or more wheels has reached its grip limit (/ page 161). # Adapt your driving style to suit the road and weather conditions. |
|
ESP® warning lamp lights up |
The yellow ESP® warning lamp is lit while the engine is running.
*ESP® is malfunctioning. If ESP® is malfunctioning, ESP® cannot carry out vehicle stabilization. In addition, other driving safety systemsare switched off. # Drive on carefully. |
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
|
ESP® OFF warning lamp |
The yellow ESP® OFF warning lamp is lit while the engine is running. *ESP® is deactivated.& WARNING Risk of skidding when driving with ESP® deactivated
If ESP® is deactivated, ESP® cannot carry out vehicle stabilization. The availability of further driving safety sys‐ tems is also limited. # Drive on carefully. |
Tire pressure monitor
| Warning/indicator lamp | Possible causes/consequences and M Solutions |
|
Tire pressure monitoring system warning lamp flashes |
The yellow tire pressure monitoring system warning lamp (pressure loss/malfunction) flashes for approximately one minute and then remains lit. *The tire pressure monitoring system is defective. & WARNING There is a risk of an accident if the tire pressure monitoring system is malfunctioningIf the tire pressure monitoring system is malfunctioning, it is not able to issue a warning if there is pressure loss in one or more of the tires. Underinflated tires may, for example, impair the driving, steering and braking characteristics.
# Have the tire pressure monitoring system checked at a qualified specialist workshop. |
|
Tire pressure monitoring system warning lamp lights up |
The yellow tire pressure monitoring system warning lamp (pressure loss/malfunction) is lit. *The tire pressure monitoring system has detected tire pressure loss in at least one of the tires. & WARNING Risk of an accident due to insufficient tire pressure Tire pressures that are too low pose the following hazards:R The tires may burst, especially as the load and vehicle speed increase. R The tires may wear excessively and/or unevenly, which may greatly impair tire traction. |
| R The driving characteristics, as well as steering and braking, may be greatly impaired. You could then lose control of the vehicle.
# Observe the recommended tire pressure. |
FAQs
There is a serious problem that needs to be addressed right away, as indicated by the red exclamation point warning light and chime. Low tyre pressure, low brake fluid, or braking system breakdown are possible causes.
A thermometer submerged in water is used to represent the engine temperature warning light. When the engine temperature rises above the acceptable operating range, it illuminates to signal potential overheating. If this occurs, stop the car right away and let the engine cool before moving on.
The Anti-lock Braking System (ABS) warning light has the shape of “ABS” enclosed in a circle. If it illuminates, there may be an issue with the ABS system and it may not operate properly. Although it is still safe to drive the vehicle, a Mercedes-Benz technician should examine it as soon as possible.
When there is a problem with the charging mechanism of the car, the battery warning light, which looks like a battery icon, illuminates. This can be the result of a bad battery, alternator, or related parts. It is advised to turn off all superfluous electrical systems and go to a Mercedes-Benz service facility for inspection if it lights up while you are driving.
An issue with the engine or emission control system is indicated by the engine-shaped yellow engine warning light. It can be brought on by a variety of problems, such as a loose gas cap and others.
The exclamation mark on the steering wheel symbolises the steering wheel warning light. It may indicate a power steering system issue when it flashes. The best course of action is to bring your automobile to a Mercedes-Benz dealership for examination and repair, even though it is normally safe to drive with this light on.
The yellow oil can warning light indicates low engine oil pressure. It’s essential to address this issue promptly, as driving with low oil pressure can lead to severe engine damage. Stop the car immediately, check the oil level, and if it’s low, add oil. If the light persists, seek professional assistance.
A horseshoe-shaped tyre with an exclamation point within serves as the symbol for the TPMS (Tyre Pressure Monitoring System) warning light. When one or more tyres have low air pressure, it illuminates. Make sure the tyres are inflated to the proper pressures by checking them. If the light continues to illuminate, there may be a tyre rupture or TPMS issue.
An issue with the airbag system is indicated by the airbag warning light, which shows a person sitting with an airbag in front of them. Without fixing the root problem, it shouldn’t be reset. To guarantee that the airbags will operate properly in the event of an accident, only a certified technician should identify and resolve the issue.
The Electronic Stability Programme (ESP) has been deactivated, as indicated by the “ESP OFF” indicator. It could be that you switched it off on purpose, or there could be a problem with the system. Press the ESP button (if applicable) once on the dashboard to regain stability control. If you press the button but the light doesn’t go out, have it looked at by a pro.
The warning light for windscreen washer fluid has the shape of a windscreen with wavy lines and the symbol “+” on it. When the washer fluid level is low, it illuminates. To guarantee clear visibility while driving, refill the washer fluid reservoir with the proper washer fluid.
A issue with the vehicle’s electrical charging system is indicated by the red battery warning light, which looks like a battery icon. A defective alternator or battery may be the cause of this. To prevent a potential breakdown, it’s imperative to stop the car right away (if it’s safe to do so) and get professional assistance.
When an issue with the engine or emission control system is discovered by the vehicle’s onboard diagnostics system, the “CHECK ENGINE” light turns on. There are several potential causes for it, from minor to serious ones. Have a certified mechanic examine the vehicle to identify and fix the exact issue.
Driving practises that save gasoline are encouraged by the green “ECO” indicator light. When you drive sustainably, such as by maintaining gradual acceleration and avoiding abrupt brakes, it typically flashes. You may improve fuel efficiency and lower emissions by adhering to the driving advice provided.
Useful Links
Download Manuals: Owner’s Manuals | Mercedes-Benz USA
View Full Manual: Mercedes-Benz A-CLASS SEDAN 2020 User Manual