Glow plug systemGlow plug system  - Warning and indicator lamps - Controls - Audi A5 Owner's Manual - Audi A5

The indicator lamp lights up to show that the glow plugs are preheating.

Your vehicle is equipped with an automatic glow plug system.

The indicator lamp the glow plugs are preheating. lights up while the glow plugs are preheating.

If the engine fails to start immediately, the glow plugs have not finished preheating. In this case, keep the clutch pedal depressed (or keep your foot on the brake if your vehicle has an automatic gearbox) until the engine starts.

Х If the glow plug indicator lamp should start flashing while the vehicle is Note

Х If the glow plug indicator lamp should start flashing while the vehicle is moving, this indicates a fault in the engine management system. The engine should be serviced without delay.
Х If the indicator lamp fails to light up when the ignition is switched on, this can mean that the glow plug system is defective.

The engine should be serviced.