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Mercedes-Benz Dashboard Warning Lights

black mercedes c class

Your Mercedes-Benz is designed to offer you a comfortable and luxurious driving experience when you’re traveling through Enterprise. But, what happens when you start your Mercedes-Benz and you notice an illuminated dashboard light or symbol? This scenario can be confusing and frustrating if you’re not sure what the warning light means.

Fortunately, our team of certified Mercedes-Benz service professionals is here to assist. If you notice a warning light illuminated on your Mercedes-Benz, we suggest you schedule a service appointment with our team before you continue driving on the Green Valley roads. In the meantime, check out our guide to the Mercedes-Benz warning lights and check engine lights with our team at Mercedes-Benz of Henderson. If you’re wondering what your car symbol means, view common auto symbols that you’ll find in your Mercedes-Benz with Mercedes-Benz of Henderson. We’ve listed them below:


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Mercedes-Benz Check Engine Light Meaning & Causes

If the light illuminated on your dashboard is a check engine light, there could be a number of reasons that causes this warning. The check engine light icon looks like a small engine and if you ignore the light, it could result in loss of fuel economy, reduced safety, and even costly repairs.

Even if you don’t notice any issues as you’re driving in Boulder City with a check engine light, it’s still a good idea to have the issue addressed. But, what causes a check engine light to come on in the first place? There are multiple issues that can trigger a check engine light but here are the most common ones:

  • Oxygen Sensor Problem: Oxygen sensors or O2 sensors are part of the exhaust system and it measures the amount of burned oxygen in your exhaust. A failing O2 sensor can cause excessive fuel consumption./li>

  • Loose, Missing, or Damaged Gas Cap: While it may seem like a simple piece of equipment, your gas cap helps maintain the pressure and venting of the gasoline fumes in your fuel system. If your gas cap is loose, missing, or damaged, Fuel can be lost through evaporation.
  • Faulty Catalytic Converter: The catalytic converter changes carbon monoxide to carbon dioxide. Without it, your vehicle will fail its emissions test, run at a higher temperature, and suffer from reduced performance and fuel economy.
  • Faulty Mass Airflow Sensor: Your mass airflow (MAF) sensor tracks the amount of air entering your engine and determines how much fuel you need. A faulty MAF sensor can damage key engine components, reduce performance, and lower efficiency.
  • Fault Spark Plugs/Plug Wires: Responsible for igniting the air/fuel mixture, spark plugs and plug wires, if damaged can lead to misfires and stalling.

Common Mercedes-Benz Dashboard Symbols & Meanings

While many Valley Automall drivers are aware of what an illuminated check engine light might look like, there are several other symbols Mercedes-Benz owners might find illuminated in their vehicles.

If you notice a light other than a check engine light in your Mercedes-Benz dashboard, you can reference your owner’s manual for details or give our team a visit. Otherwise, here are some common Mercedes-Benz dashboard symbols and their meanings:


ABS Warning Indicator

ABS Light

  • Icon: Circle with “ABS” in the center and one curved line on either side.
  • Meaning: The Anti-Lock Brake System along with the ESP®, BAS®, Electronic Brake Force Distribution, and Hill-Start Assist are deactivated. You can still slow your vehicle and stop, but the system won’t respond when emergency braking is needed. 


Power Steering Light

Steering Wheel Light

  • Icon: Steering wheel with an exclamation point next to it.
  • Meaning: Power steering is no longer activated and you may need extra force to turn the steering wheel.


Battery Indicator Warning Light

Battery Light

  • Icon: Battery with a plus and minus sign.
  • Meaning: The battery isn’t able to charge properly. This may be caused by a malfunction with the alternator, poly-v belt, or a problem with the electrical system.


Brake Wear Indicator

Brake Wear Light

  • Icon: Circle with a dotted line on either side.
  • Meaning: Not to be confused with the ABS light, the brake wear light indicated when your brake pads or rotors need to be replaced.




  • Icon: Steaming cup on a saucer.
  • Meaning: The ATTENTION ASSIST® system monitors your driving status for signs of sleepiness. When this light shows up in the dash, it’s time to take a driving break. 


Glow Plug Indicator Light

Glow Plug Light

  • Icon: Yellow coil.
  • Meaning: If you drive a diesel, the glow plugs heat the cylinders within the engine. When this light comes on, it simply means the glow plugs are heating the cylinders.


Ad Blue/DEF Warning Light

DEF/AdBlue® Indicator

  • Icon: Two rows of vertical dots on top of a horizontal funnel.
  • Meaning: DEF stands for Diesel Exhaust Fluid and it plays a crucial role in your emissions system. If the light is on, it means you’re running low on DEF.


ESP/ESC Engaged Indicator

ESC/ESP® Light

  • Icon: Car with two skid marks.
  • Meaning: The Electronic Stability Control (previously referred to as ESP®, Electronic Stability Program) has been deactivated and you may experience reduced traction.


Engine Coolant Level Light

Coolant Light

  • Icon: Red temperature gauge over fluid lines.
  • Meaning: Your vehicle may have a malfunctioning temperature gauge or the coolant volume is too low. If you notice your vehicle’s temperature gauge climbing, it may be a good idea to pull over and turn your vehicle off immediately. Driving while your engine is overheating can be detrimental.


Tire Pressure Warning Light

Tire Pressure Light

  • Icon: Flat tire.
  • Meaning: One or several of your tires has reduced tire pressure. Sometimes, it can also mean that a tire pressure sensor needs to be replaced.


Low Fuel Light

Gas Light

  • Icon: Gas pump.
  • Meaning: You’re running low on fuel.


Seat Belt Warning Light

Seat Belt Light

  • Icon: Person with seat belt.
  • Meaning: The driver or passenger needs to fasten their seat belts. This indicator light is often paired with an audio warning as well.


SRS Airbag Indicator

Airbag Light

  • Icon: Person with airbag deployed in front of them.
  • Meaning: This indicates that the SRS (Supplemental Restraint System) is not working. If an accident was to occur, the airbag may not deploy. If you notice this light illuminated, visit a service center immediately.


Schedule Your Service Pick-Up & Delivery in Henderson Today

If you need to bring your vehicle in to have your auto symbols checked, you don’t have to spend the afternoon waiting at our dealership thanks to our service pick-up and delivery. We’ll pick up your vehicle, use our advanced diagnostic equipment to decipher your car symbol meanings, make any needed repairs or corrections, and then return it to your home! Whether you’re in Las Vegas or somewhere else, you can receive service from us.

Check Your Mercedes-Benz Dashboard Warning Lights

Still have questions or need more Mercedes-Benz dashboard warning lights explained? Contact the team at the Mercedes-Benz of Henderson service center. We can discuss additional Mercedes-Benz symbols and meanings or simply look over your vehicle to provide you with a quick and accurate diagnosis.

Featured Service Special

Multi-Point Inspection Special


Our team of Master Certified Technicians will complete a comprehensive multi-point inspection of your vehicle.

Following your inspection, you will receive a detailed report of your vehicle’s condition.

Special internet offer must be presented to the Service Advisor at the time of write-up and prior to the service being performed. Valid at Mercedes-Benz of Henderson. Excludes Tires, Fletcher Care, Prepaid Maintenance, Warranties, Deductibles, etc. Cannot be combined with any other offer or applied to past services. Does not include applicable taxes, shop supplies, hazardous waste fees, or pick-up and delivery. Limit one original offer per person. Other restrictions may apply. Void where prohibited. See Dealer for details.

EXPIRES: 07/31/2024
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