When you switch on the ignition, some of the warning and indicator lamps light up briefly to show that the associated systems are working properly. These systems are marked with a 
in the following tables. If one of these warning/indicator lamps does not light up, there is a fault in the associated system.
in the following tables. If one of these warning/indicator lamps does not light up, there is a fault in the associated system.Red warning lamps
 |
Brake system
Link |
 |
Electro-mechanical parking brake
Link |
 |
Cooling system
Link |
 |
Engine oil pressure
Link |
 |
Engine oil level
Link |
 |
Alternator
Link |
 |
Front seat belt
Link |
 |
Electro-mechanical power steering
Link |
 |
Steering lock
Link |
 |
Engine start system
Link |
 |
Speed warning function
Link |
 |
Adaptive cruise control*
Link |
 |
Air suspension
Link |
 |
Night vision assist
Link |
AdBlue  |
AdBlue*
Link |
| AdBlue [a331] |
AdBlue*
Link |
| [a345] |
Hybrid drive*
Link, Link |
Yellow indicator lamps
 |
Electronic stabilisation control (ESC)
Link |
 |
Electronic stabilisation control (ESC)
Link |
 |
Anti-lock brake system (ABS)
Link |
 |
Safety systems
Link |
 |
Brake pads
Link |
 |
Electro-mechanical parking brake
Link |
 |
Tyre pressure monitoring display
Link |
| TPMS |
Tyre pressure monitoring system
Link |
   |
Engine management system (petrol engines)
Link |
 |
Engine management system (diesel engines)
Link |
 |
Emission control system
Link |
 |
Diesel particulate filter*
Link |
 |
Engine speed governing
Link |
 |
Engine oil level
Link |
 |
Engine oil sensor
Link |
 |
Battery charge
Link |
 |
Fuel tank system
Link |
 |
Washer fluid level
Link |
 |
Windscreen wipers
Link |
 |
Remote control key
Link |
 |
Remote control key
Link |
 |
Battery in remote control key
Link |
 |
Bulb monitor
Link |
 |
Front fog lights
Link |
 |
Rear fog light
Link |
 |
Headlight range control
Link |
 |
Adaptive light*
Link |
 |
Light sensor/rain sensor
Link |
 |
Active lane assist*
Link |
 |
Gearbox
Link |
 |
Gearbox
Link |
 |
Steering lock
Link |
 |
Engine start system
Link |
 |
Electro-mechanical power steering, dynamic steering*
Link |
 |
Air suspension
Link |
 |
Sport differential*
Link |
 |
Towing bracket*
Link |
AdBlue  |
AdBlue*
Link |
| AdBlue [a331] |
AdBlue*
Link |
| [a345] |
Hybrid drive*
Link |
Further indicator lamps
 / |
Turn signals
Link |
 |
Trailer turn signals*
Link |
 |
Cruise control system*
Link |
 |
Adaptive cruise control*
Link |
 |
Adaptive cruise control*
Link |
 |
Adaptive cruise control*
Link |
 |
Active lane assist*
Link |
 |
Audi hold assist
Link |
 |
Start/stop system
Link |
 |
Start/stop system
Link |
| [a341] |
Hybrid drive*
Link |
| [a341] |
Hybrid drive*
Link |
| [a342] |
Hybrid drive*
Link |
 |
Main beam headlights
Link, Link, Link |
| [a343] |
Rear seat belt
Link |
 |
Rear seat belt
Link |
| [n694] |
Rest recommendation*
Link |