Mercedes is preparing a massive product onslaught, with as many as 32 new models launching by 2022. After the new S-Class debuted in September, the next major model debut will likely be the new C-Class, which was recently spied undergoing prototype testing. The new Mercedes SL is also returning to its sport car roots.

Mercedes isn't neglecting its niche models either. For the first time, our spies have caught a prototype of the new updated Mercedes CLS being put through its paces. The current model only went on sale for the 2019 model year, but Mercedes is wasting no time giving the swoopy sedan a refresh to help it compete with the BMW 8 Series Gran Coupe and Audi A7 Sportback.

Development appears to be at an early stage since only the front bumper is camouflaged, suggesting there will be some minor tweaks to the front such as a restyled front bumper and new headlights. As development progresses, the rear bumper will also receive some subtle changes and the rear lights will likely be updated with new graphics. We don't have any photos of the interior to share yet, but the expect the CLS to be upgraded with the latest MBUX infotainment system and driver assists.

Under the hood, engine options should carry over. In the US, the Mercedes CLS is offered with a 3.0-liter turbocharged six-cylinder producing 362 horsepower and 369 lb-ft, while an EQ boost system adds an additional 21 hp and 184 lb-ft.

Power is sent to either the rear or all four wheels through a nine-speed automatic transmission. The more powerful AMG CLS 53, on the other hand, produces 429 hp and 384 lb-ft of torque from the same engine and also gains an extra 21 hp and 184 lb-ft from the EQ boost.

The updated Mercedes CLS is expected to debut next year and go on sale as a 2022 model. Let's hope the refresh can improve sales because Mercedes is considering dropping the CLS from its model lineup along with the GT 4-Door and replacing them with a single electric model, so this could be the final update before the CLS gets the chop.