- Fig. 1 Centre console: START ENGINE STOP button
You can use the START ENGINE STOP button to switch on the ignition and start the engine.
Switching the ignition on/off
To switch the ignition on/off, press the START ENGINE STOP button without pressing the brake pedal. Diesel engines are preheated when the ignition is switched on.
Starting the engine
Hybrid Audi A8s: Please note the information on starting the Audi A8 Link.
Press the brake pedal WARNING!.
Press the START ENGINE STOP button Fig. 1. The engine should start.
Diesel engines can take a few seconds longer than usual to start on cold days. Please keep your foot on the brake pedal until the engine starts. The indicator lamp 
lights up while the glow plugs are preheating.
lights up while the glow plugs are preheating.If the engine fails to start immediately, the starter will be switched off automatically after a few seconds. Try to start the engine again.
Start/stop system
Please note the information on Link.
- Never run the engine in confined spaces. The exhaust gases are toxic – risk of poisoning!
- Never switch off the engine until the Audi A8 is stationary.
- The brake servo and the power steering system work only when the engine is running. You need more strength to steer and brake the Audi A8 when the engine is switched off. This would mean a greater risk of accidents and serious injury, because you cannot steer and brake in the normal manner.
Caution!
Avoid high engine speeds, full throttle and extreme load conditions until the engine has reached its normal operating temperature; otherwise this can damage the engine.
Note
- When starting from cold the engine may be a little noisy for the first few seconds until oil pressure has built up in the hydraulic tappets. This is quite normal and no cause for concern.
- If you leave the Audi A8 with the ignition switched on, it will be switched off automatically after a while. Please note that electrical equipment such as the exterior lighting will also be switched off.