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Mercedes-Benz Warning Lights

Mercedes-Benz Dashboard Warning Lights Explained

No one likes to see an illuminated warning light on their dashboard. Some warning lights aren’t dire, but others, like the check engine light or ABS light, require the attention of certified technicians. Mercedes-Benz warning lights specifically can be confusing for some because they sometimes refer to brand-exclusive features like ATTENTION ASSIST®. To make it easier for San Bernardino drivers to understand their car light symbols and meanings, Mercedes-Benz of Ontario has put together a helpful guide. Get your Mercedes-Benz dashboard warning light explained below!

Common Mercedes-Benz Dashboard Symbols & Meanings

ABS Light

Icon: Circle with “ABS” in the center and one curved line on either side

Meaning: The Anti-Lock Brake System is deactivated, as well as ESP®, BAS®, Electronic Brake Force Distribution, and Hill-Start Assist. You can slow and stop, but the system won’t sense or respond to emergency braking or vehicle instability.

Steering Wheel Light

Icon: Steering wheel with an exclamation point next to it

Meaning: Power steering isn’t working. You’ll need to forcefully turn the wheel. 

Battery Light

Icon: Battery with a plus and minus sign

Meaning: The battery isn’t charging properly. This could be due to a malfunctioning alternator, poly-v belt, or a problem with the electrical system.

Brake Wear Light

Icon: Circle with a dotted line on either side

Meaning: It’s time to replace the brake pads and/or brake rotors. To avoid vehicle damage and safety hazards, schedule a brake replacement ASAP.


Icon: Steaming cup on a saucer

Meaning: ATTENTION ASSIST® monitors your driving behaviors for signs of sleepiness. This light means it’s time for a break.

Check Engine Light

Icon: Engine

Meaning: This light can signify an issue with the engine itself, fuel or fuel injection systems, ignition, or exhaust. High emissions could have also caused the engine to enter emergency mode.

Glow Plug Light

Icon: Yellow coil

Meaning: Glow plugs heat the cylinders inside a diesel engine, such as the one inside the Sprinter Van. When this light is on, the glow plugs are in the process of heating the cylinders.

DEF/AdBlue® Indicator

Icon: Two rows of vertical dots on top of a horizontal funnel

Meaning: It’s time to top off you Diesel Exhaust Fluid (DEF), as it’s low. Used to create catalytic reaction to remove particles from the exhaust, this fluid plays a crucial role in your emissions system.

ESC or ESP® Light

Icon: Car with two skid marks

Meaning: The Electronic Stability Control (previously known as ESP®, Electronic Stability Program) has been deactivated. This feature will not intervene if the vehicle begins to skid. 

Coolant Light

Icon: Red temperature gauge over fluid lines

Meaning: You may have a faulty temperature gauge on your hands, or the coolant level may be too low. Keep an eye on the temperature, and if the coolant exceeds 248 degrees Fahrenheit (120 degrees Celsius) pull over immediately. Driving a vehicle with temperatures this high could destroy the engine. 

Tire Pressure Light

Icon: Flat tire

Meaning: There has been a drop in tire pressure in one or more of your tires and they don’t have a sufficient amount of air in them. Find a safe spot to pull over and check your tires and refill or replace your tire if needed. 

Gas Light

Icon: Gas pump

Meaning: Most often, this will mean your fuel level is too low, and you’ll need to pull over to fill up. Sometimes this can also indicate the fuel system pressure is too low from things like a fuel cap not being closed or a leak.

Seat Belt Light

Icon: Person with seat belt

Meaning: The driver or front passenger needs to fasten their seat belts. If the vehicle reaches 15 mph, the light will be paired with an audio alert. 

Airbag Light

Icon: Person with airbag deployed in front of them

Meaning: This means the SRS (Supplemental Restraint System) is malfunctioning. If an accident were to occur, the airbag may not deploy. Seek service as soon as possible. 

Don’t Ignore Illuminated Mercedes-Benz Dashboard Symbols!

Is your dashboard displaying any of the above warning lights or another icon not listed above? For more information about Mercedes-Benz dashboard symbols and meanings, contact us or schedule a service appointment at Mercedes-Benz of Ontario, located a short drive from Fontana and Rancho Cucamonga. Before you book, take a moment to browse our current service specials and parts specials for savings opportunities.

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3787 East Guasti Road • Ontario, CA 91761

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Mercedes-Benz of Ontario

3787 East Guasti Road Ontario, CA



Phone: (909) 212-8400

3787 East Guasti Road Ontario, CA


Phone: (909) 212-8500

3787 East Guasti Road Ontario, CA


Phone: (909) 212-8500

3787 East Guasti Road Ontario, CA
34.0657451 -117.5712687
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Mercedes-Benz of Ontario
Mercedes-Benz of Ontario
3787 East Guasti Road
Ontario, CA, 91761 United States
Mercedes-Benz of Ontario 34.0657451, -117.5712687.