Question: What is the name of this high-performance version of the 6 series coupe/ convertible, which appeared on the Moscow BMW billboard?
Sentence (from "BMW M4"): Part of the renumbering that splits the 3 Series coupe and convertible models to the 4 Series (to further differentiate it from the 3 Series), the M4 replaced the M3 Coupe and Convertible models.
Relevant evidence: No