When the outside temperature is low, the display in the instrument cluster may take slightly longer to appear than it does when the outside temperatures is higher.
Additional information and warnings:

WARNING
Instruments
Instrument overviewTread Depth, Measuring
Note
When measuring tread depth, take measurements in the main
grooves.
Do not take measurements at the tread wear indicator.
Tread depth of a tire must be mea ...
Special Tools
Special tools and workshop equipment
required
Torque Wrench 1331 5-50Nm -VAG1331-
Crimping Pliers, Complete -VAS1978/1A-
...
Wheel, Mounting, Audi Assembly Instructions
Vehicles with Tire Pressure Monitoring Sensor.
If wheels are changed (for example, change from summer to
winter tires), wheel electronics send data as soon as speed of
new wheels exceeds 25 km/h (15.53 mph). The control module
automatica ...