Mercedes-Benz is shuffling the E-Class’ and CLS’ engine range in the UK, with new power units going on sale effective immediately, as first deliveries are expected in October. Among the changes is the E 400 4Matic getting axed in favor of the E 450 4Matic as far as the Coupe and Cabriolet models are concerned. The E 450 Coupe is priced from £ 50,900, while the Cabrio costs upwards of £ 55,395.

With 367 PS and 500 Nm of torque at their disposal, the E 450 Coupe and Cabriolet can rocket to 100 km/h in 5.6 seconds and 5.8 seconds respectively, while being limited to a top speed of 250 km/h.

Meanwhile, the E 400d 4Matic is replacing the E 350d, offering 340 PS and 700 Nm of torque, taking the Coupe version to 100 km/h in 5.1 seconds, and the Cabriolet in 5.2 seconds. Top speed is again 250 km/h.

For more practical purposes, there’s the E 400d 4Matic All-Terrain, which now replaces the E 350d version. It’s priced from £ 64,445 and it comes with the same 3.0-liter inline six-cylinder engine as its two-door siblings. While power and torque figures are identical to the ones mentioned above, the All-Terrain will need 5.4 seconds to reach 62 mph from a standstill.

This rugged version of the E-Class also gets a 360-degree camera, Air-Balance package, Energizing Comfort package and wireless phone charging – useful if you have a compatible smartphone. As for the Mercedes CLS 350, priced from £ 52,625, it features an all-new four-cylinder petrol engine, producing 299 PS and 400 Nm of torque. It also comes with EQ Boost technology, which generates a further 14 PS and 150 Nm. In a straight line, it will hit 100 km/h in 6 seconds flat.