The first key is the Italian brand Alfa Romeo, which is famous for its romantic and novel design.
The second key is the famous Mercedes-Benz, whose comfort is self-evident.
The third key is the Swedish brand Volvo, which claims to be the safest car in the world and is trustworthy, and every year, the NCAP crash test Volvo's full range of models can pass with full marks.
The fourth key is BMW, which is famous for its fun to control.
The meaning of the advertisement: Audi is a car brand with perfect design, comfortable enjoyment, safe performance and extreme control.
I remember there are many language versions of this advertisement, but the others are not clear.