smart Warning Lights | Complete Guide with Images

Warning lights will appear on your dashboard momentarily as you switch on your ignition, but they should disappear within a few seconds. Lights which remain visible, may indicate an issue. Follow our handy guide on SMART warning lights to quickly identify what each light represents on your SMART dashboard.

SMART Warning lights are categorised into colours to distinguish the name oi the problem. They are:

RED: This indicates a fault has been detected. These lights are a high priority, meaning you should stop your vehicle immediately and contact your SMART dealership.

YELLOW: Amber light indicates a potential fault with your vehicle. They are less of a priority in comparison to red warning lights, but they should not be dismissed! Ignoring these lights could develop into something more serious. Stop your vehicle in a safe place and attempt to find the issue. If required, you should contact roadside assistance or your SMART dealership.

GREEN or BLUE: These represent notification lights, signalling a feature is turned on and in operation.


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Red Warning Lights

SEAT BELT WARNING LIGHT (RED)

Most cars are now accompanied by a system that will warn you if any passengers have not got their seatbelt fastened into your car. Using sensors it will assess the pressure on the seats, if this meets a particular weight, it will assume you or a passenger is in your car travelling without a seatbelt. As well as the light on your dashboard, your smart will also alert you with a noise until all seatbelts are fastened. If your speed exceeds 20 km/h, this light will flash.​

​DOORS OR TAILGATE LIGHT (RED)

When this light illuminates, it means one or some of your doors or the tailgate is open. You should pull over safely and ensure all doors and the tailgate are securely closed.

RESTRAINT SYSTEM (RED)

This light will appear if the restraint system is malfunctioning. If restraint systems are not working correctly, they can often be triggered unintentionally or may not trigger when critical to do so, in the event of an accident.

You should get this fixed by a specialist or contact your local smart dealership. 

DISTANCE WARNING SIGNAL (RED)

When this light is lit and a tone sounds, it means the vehicle is in close proximity to another car or obstacle on the road. Remain aware of road conditions, maintain your distance and be ready to brake.

BRAKE WARNING LIGHT (RED)

You will see this warning light as soon as you switch your ignition on, however it will turn off after a few seconds. If the warning light persists or becomes visible during driving it suggest the parking brake has been applied, an issue with the brake system or brake fluid is low. Do not top up the brake fluid, as this will not resolve the fault. Continuing to drive with this light on could cause damage to your vehicle or an accident, stop safely and contact your Smart Dealership.​

LOW OIL PRESSURE(RED)

This will light up as soon as the ignition is on, but it will shortly disappear. If it doesn’t or it appears during your journey, you should stop your vehicle at the next safest moment and check your oil levels ​

COOLANT TEMPERATURE (RED)

Once safe to do so, you should stop your vehicle. The visibility of this light indicates your coolant level is too low or the engine has exceeded normal temperatures and could be at risk of overheating. This light should not be ignored, since it can cause significant damage to your engine if you are not careful. If levels are low, you should replenish the coolant to the appropriate level. 

If your engine has overheated and remains hot, you shouldn’t open the bonnet. Doing so, could cause you injury. Wait for it to cool down, assess the situation and contact a specialist or local smart dealership.  ​

BATTERY (RED)

This light signals that your car is running low on charge and it isn’t being recharged. This could be an issue with the battery, the v-belt or the battery alternator itself which is responsible for charging the battery.


​Yellow Warning Lights

TYRE PRESSURE MONITOR

TPMS (Tyre Pressure Monitoring Systems) have become a mandatory feature for cars in recent years. This light will notify you that tyre pressure is low. You should stop your car safely, check your tyres and inflate them to the correct tyre pressure levels and then restart your tyre pressure monitor. Low pressure can affect braking and potentially cause a blowout if the car is driven at high speeds.​

POWER STEERING

This would indicate a fault with the power assistance, resulting in you needing more force to steer. This increases the risk of an accident, since you are unable to steer at normal response rates. You should stop your vehicle, when safe to do so and contact a specialist or your local smart repair centre. ​

FORWARD COLLISION WARNING

This light may appear due to the following:

  • Heavy Rain or Snow
  • Operating Temperature is too high
  • On Board Voltage is too low

Once the above is resolved, the light should disappear. If it remains lit you should pull over, clean your sensors and restart the engine.​

LANE KEEPING ASSIST

An information light, alerting you your vehicle is straying from its lane. Ensure you are within the line boundaries and always indicate first to alert other drivers on the road you are able to change lane.​

lane departure warning

REAR FOG LAMP

This light becomes visible when the rear fog lamps are turned on. This feature should only be used in foggy conditions. ​

FOG LAMPS

Fog lamps light will appear when activated and distinguish once turned off ​

ENGINE WARNING LIGHT

As you switch the ignition on, this light will illuminate but should disappear after around 10 seconds. If this remains visible, you should stop your vehicle safely and contact your smart dealership. It signals a fault with one or two of the following:

  • Engine Management
  • Exhaust System
  • Fuel System
  • Accelerator Pedal Sensor   
warning lights

AUTOMATIC START/STOP SYSTEM WARNING

This light becomes visible when driving and when stationary in your vehicle. It means the system has malfunctioned and has been automatically switched off. You should contact a specialist or your local smart dealership.​

ANTI-LOCK BRAKING SYSTEM (ABS)

This amber light will appear for a few seconds once the ignition is switched. If the anti-lock braking system (ABS) warning light appears on your dashboard during driving and does not go away, it would indicate a fault with the ABS system. An issue with the ABS can often result in other safety systems becoming inoperative. You should stop the vehicle when safe and contact your local Smart Dealership.​

ELECTRONIC STABILITY CONTROL SYSTEM FAILURE

If this light is illuminated, it means the ESP is faulty and unable to stabilise the car. This results in other safety systems being deactivated, increasing the likelihood of skidding or an accident. You should be more cautious and adapt your driving for the road conditions, whilst the system malfunction exists.​

LOW FUEL LEVEL

A common warning, this light will become visible when you have little petrol left in the tank. With only a few miles left in the tank, you should look to find your nearest petrol station and refill with the relevant fuel. ​

TRANSMISSION ELECTRONICS

Appears when there is a fault with the transmission electronics.  This also deactivates the automatic stop/start system and cruise control functions. Safely pull over, secure the vehicle and contact a specialist or your local smart repair centre.​

warning lights

CRUISE CONTROL

When the light appears and the tone sounds, this indicates a fault with the cruise control system, which deactivates automatically. This could be a fault of the system or it has been deactivated due to a malfunction with the transmission electrics. Consult your local specialist or visit a smart dealership for diagnosis.​

LIMITER

This flashing lights means your vehicle is exceeding the set speed limit. You should brake, adjusting your speed accordingly to road conditions. If this light flashes for 10 seconds, it would reference a fault. Contact your smart repair centre.​

BLACK ICE WARNING

This light will flash at you or continuously light up. It’s alerting you that the outdoor temperature has dropped or is below 3oc – a risk of black ice. You should be extra cautious and adapt the way you drive to the conditions. ​

BRAKE LAMPS

Your brake lamps are not working, check your bulbs or LEDs they most likely need replacing. ​

SERVICE DUE DATE

After you have started the engine, this light will flash. It is alerting you that a minor service or full service is imminent or the date has already passed.  You should contact your smart dealership and book a service at the next availability slot. ​

Green Lights

DIRECTION INDICATORS LEFT & RIGHT

Green light indicators will become visible when signalling left or right. If you activate the hazard lights, these lights will continue to flash. ​

indicator warning lights

AUTOMATIC START/STOP SYSTEM           

This green light indicates the system has automatically switched off the engine, this light will also be accompanied by a warning tone. To stop this, you need to close the driver’s door, ensure seat belts are fastened and restart your engine. ​

DIPPED BEAM HEADLAMPS

This illuminates when your full beams are activated or are flashed.​

SIDELAMPS

This light will appear on your display when you activate your side-lamps/sidelights

Blue Informational Lights

MAIN BEAM HEADLAMPS

This blue light means the main beans are in use (these lights can also be known as full beam).​​

If you were unable to find the warning light displayed on your dashboard and need more information, our expert team at our Smart dealerships would be more than happy to help. Get in touch!


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*Refer to owner’s manual or seek professional assistance.

The information on warning lights on this page does not apply to electric cars. Please consult your owner's manual.