Instruction book AUDI A4
 Audi A4   Controls   Driving  Convenience key
Applies to Audi A4s: with convenience key
You can use the START ENGINE STOP button to switch on the ignition and start the engine.
Starting the engine
Manual gearbox: Press the clutch pedal all the way down and move the gear lever into neutral.
Audi A4s with automatic gearbox: Press the brake pedal and move the selector lever to position P or N.
Press the START ENGINE STOP button. 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 clutch pedal (manual gearbox) or brake pedal (automatic gearbox) until the engine starts. The indicator lamp lights up while the glow plugs are preheating.
Switching the ignition on/off
If you only wish to switch on the ignition and do not want to start the engine as well, proceed as follows:
Press the START ENGINE STOP button without pressing the clutch pedal (manual gearbox) or brake pedal (automatic gearbox).
To switch off the ignition, press the button again.
Diesel engines are automatically preheated when you switch on the ignition.
Electrical components with a high power consumption are switched off temporarily while you start the engine.
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!
  • Always take the key with you when you leave the Audi A4. Otherwise the engine can be started or power-operated equipment such as the electric windows can be used. This could result in serious injury.
  • Never leave children or disabled people alone in the car. The doors could be locked with the remote control key and the occupants could become trapped in the Audi A4. The Audi A4 occupants could be exposed to extremely high or low temperatures, depending on the time of year.
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.
  • 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 your Audi A4 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.

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