A new reference value needs to be stored when certain changes have been made, such as every time you change to wheels that require a different recommended tyre pressure. The reference value may also need to be updated when there is a significant change in the car's weight due to loading or unloading.
To save a new reference value, the car needs to be turned on and stationary.
Inflate the tyres to the correct tyre pressure.1
Press the car symbol 
in the bottom bar and go to Status.
in the bottom bar and go to Status.Note
The Update reference pressure button is used to save a new reference value for the tyre pressure monitoring system. For safety reasons, it's only available when the car is turned on and stationary.
Go to Tyre pressure Update reference pressure and confirm the change. The confirmation step is needed to avoid saving a new reference value by mistake.
This overwrites the previous tyre pressure and enters a new reference value.
Start driving the car. The new value will be stored after driving for several minutes at a speed above 30 km/h (20 mph).
- Once a new reference value is saved, the animation showing the saving progress disappears from the centre display.
- If saving fails, a notification is shown in the centre display's car status view.