Why does the Audi A2 use an aluminum chassis?

I'm considering buying an Audi A2 and noticed that it has an aluminum chassis instead of steel like most cars. What are the benefits of using aluminum in the chassis and what are the potential drawbacks?

Using aluminum in the chassis of the Audi A2 allows for a lighter and more fuel-efficient vehicle. It also provides better handling and agility on the road.

Unfortunately, the use of aluminum in the chassis can also make repairs more expensive as it requires specialized equipment and training. Make sure to factor this in when considering the overall cost of ownership.