Audi A4 - the milage gage on my onboard computer does it tell you how many miles can do in your tank or figure out current speed?

The mileage gauge on your onboard computer in an Audi A4 does both. It provides information about your current fuel level and estimates the remaining distance you can travel on that fuel. Here's how it works:

1. Fuel Level Indication:

- The mileage gauge displays the amount of fuel remaining in the fuel tank. It typically shows the fuel level in gallons or liters.

2. Distance to Empty (DTE):

- The mileage gauge also displays an estimate of the distance you can travel before the fuel tank runs dry. This is known as the Distance to Empty (DTE).

- The DTE calculation considers your current fuel level and the average fuel consumption based on recent driving patterns.

3. Current Speed:

- In addition to fuel-related information, the mileage gauge usually displays the vehicle's current speed.

- This speed reading comes from the car's speed sensor and provides you with real-time information about how fast you're traveling.

4. Average Fuel Consumption:

- Some Audi A4 models also display the average fuel consumption for the current trip or over a longer period. This information can help you monitor your fuel efficiency and driving habits.

The mileage gauge combines fuel level indication, DTE estimation, and current speed display in one convenient location, allowing you to manage your fuel efficiently and plan your trips effectively.