Audi’s Q9 challenges the Mercedes GLS with 4D audio and a digital cabin for 10K less Audi Car Tech Comparison GLS 450 Mercedes-Benz Q9 Technology Audi’s Q9 challenges the Mercedes GLS with 4D audio and a digital cabin for 10K less Carl Anthony May 14, 2026 The primary difference between these two flagship SUVs lies in their digital architecture. Read More Read more about Audi’s Q9 challenges the Mercedes GLS with 4D audio and a digital cabin for 10K less