Where is the defogger for Audi A6L?

[VonIsaac]

Audi A6L defogger switch is located near the air conditioning buttons in the central control area. Specific usage method: Press the one-touch start button near the vehicle's central control to activate the defogger. Causes of windshield fogging: Fogging occurs under two conditions: high humidity and low temperature, both of which must be present simultaneously. Reason one: When the window temperature falls below the dew point under certain air humidity conditions, condensation forms on the window surface, which is the commonly observed front windshield fogging phenomenon. This typically occurs on stationary vehicles, such as water droplets appearing on the outside of the windshield on summer mornings. Reason two: When there is a temperature difference between the two sides of the window, and the saturated vapor pressure on the cooler surface is lower than the surrounding environment's vapor pressure, moisture gathers on the glass surface, forming tiny droplets that manifest as fog. If the dew point is above zero degrees Celsius, fog forms; if below zero degrees Celsius, frost forms instead.