Audi A6  Controls and displays  Instruments and warning/indicator lamps  Warning and indicator lamps
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.
Red warning lamps

Brake system
Link

Electro-mechanical parking brake
Link

Cooling system
Link

Engine oil pressure
Link

Engine oil level
Link

Alternator
Link

Engine stopped while vehicle is moving
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

Pneumatic suspension
Link

Night vision assist*
Link

Night vision assist*
Link

Clutch (manual gearbox)
Link
AdBlue
AdBlue*
Link
AdBlue
AdBlue*
Link

Central warning/indicator lamp
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 loss indicator
Link

Tyre pressure loss indicator
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

Engine warm-up requested
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

Rear fog light
Link

Headlight range control
Link

Adaptive light*
Link

Light sensor/rain sensor
Link

Active lane assist*
Link

Gearbox (automatic gearbox)
Link,
Clutch (manual gearbox)
Link

Gearbox
Link

Steering lock
Link

Engine start system
Link

Brake servo
Link,
Central warning/indicator lamp
Link

Electro-mechanical power steering, dynamic steering*
Link

Pneumatic suspension*
Link

Sport differential*
Link

Towing bracket*
Link
AdBlue
AdBlue*
Link
AdBlue
AdBlue*
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

Hold assist
Link

Start/stop system*
Link

Start/stop system*
Link

Park assist*
Link

Park assist*
Link

Rear seat belt
Link

Rear seat belt
Link

Rest recommendation*
Link

Main beam assist*
Link

Main beam headlights
Link, Link

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