BMW is thought to be preparing a four-door coupe to rival the Mercedes CLS.
Although BMW hasn't said anything official about the car, it's expected to go on sale in 2009. Our computer artists have lifted the lid on what the car is likely to look like.
Initially, industry rumours were that the car could have reverse-opening rear doors, like the Mazda RX-8, but latest thinking suggests they will be conventional affairs similar to those on the Mercedes.
BMW isn't the only manufacturer lining up a four-door coupe. Volkswagen and sister-company Audi are both preparing a wave of new niche models and have CLS-style coupes high on the list.
