The Mercedes-Benz CLS-Class is a series of executive cars produced by Mercedes-Benz since 2004. The original model was a four-door fastback based on the Mercedes E-Class platform, marketed as a four door coupe. A Shooting Brake model was later added to the model range with the second generation CLS. All models are available as a high performance AMG variant, although it wasn't until the second generation CLS that 4-MATIC all-wheel drive was offered. The CLS range is positioned above the E-Class but below the S-Class in the Mercedes model range, and models tend to be less practical than the E-Class it is based on. The C257 CLS is the third and current generation model, and is only available as a 4-door sedan and in all-wheel drive (4-MATIC) configuration. The Shooting Brake body style was in development for the C257 CLS, but was shortly discontinued due to poor and declining demand overseas for the last generation model. The range of engines consist of a 3.0-litre straight six turbocharged petrol engine and a 2.9-litre straight six turbocharged diesel engine.