
The CLS has frameless doors. Body dimensions of the Mercedes-Benz CLS: The 2020 Mercedes-Benz CLS measures 4988mm in length, 1890mm in width, and 1427mm in height, with a wheelbase of 2939mm. The side profile is designed with minimal character lines, giving it a smooth and flowing appearance. Powertrain specifications: The 2020 Mercedes-Benz CLS is equipped with a 2.0T high/low-power turbocharged engine paired with a 48V mild hybrid system. The high-power version delivers a maximum output of 220kW (299PS) at 6100rpm and peak torque of 400N-m between 3000-4000rpm. The low-power variant produces 190kW (258PS) at 6100rpm and 370N-m of torque between 1800-4000rpm. Both versions are mated to a 9-speed automatic transmission.

















Driving a CLS is quite interesting, with its frameless door design where the glass connects directly to the roof without a hard frame. I usually drive it to work or for weekend outings. When opening the door, the glass slightly lowers before the door opens, giving it a stylish look that often catches the attention of passersby when parked. The wind noise is noticeable at high speeds, so I have to turn up the music to drown it out. The sealing is decent, but during the rainy season, it's best to spray some rust inhibitor on the rubber seals. For maintenance, it's essential to visit a professional shop—avoid forcefully pulling the door handle yourself, as it might cause the glass to get stuck, leading to more trouble. Overall, these doors make the car appear more sporty and dynamic, perfect for owners who seek individuality.

As an automotive enthusiast, I've studied the structure of the CLS, which features a frameless door design – a classic characteristic of coupes. When opening the door, the window automatically lowers slightly, eliminating the frame to create smoother roof lines and a more visually elegant appearance. However, in practical experience, the sound insulation is slightly inferior compared to framed doors, with wind noise entering the cabin at high speeds, requiring compensation from the noise cancellation system. When compared to the BMW M4 or Audi A7, the CLS's door design prioritizes aesthetics more, requiring regular maintenance to clean dust from the tracks to ensure smooth window operation. This design is common among luxury vehicles, enhancing the overall premium feel and adding a more dynamic driving pleasure.

I've tried my friend's CLS, which has frameless doors. Every time you open the door, the window slightly lowers before opening, which feels really cool. There's a bit of wind noise while driving, especially in cold winters when the sealing isn't perfect, but overall it doesn't affect daily use. The sound insulation is decent, and adding some sealing strips would make it even better. The body lines are stylish, making it perfect for city driving.

From a practical perspective, the CLS indeed features frameless doors, a design that enhances its modern appearance and reduces weight. However, in daily use, drawbacks such as increased wind noise and slightly inferior sealing may arise, with potential water seepage during rainy days, necessitating regular replacement of sealing strips. The advantage lies in the reduced likelihood of door scratches in tight parking spaces, though maintenance costs are slightly higher, but it significantly boosts visual appeal. Owners are advised to check the door tracks for freeze protection in winter and keep them dry. Overall, this door design strikes a balance between style and functionality.

Over the years of repairing cars, I've encountered many CLS cases, and the doors are indeed designed as standard frameless. Common issues include power window regulator failures or aging sealing rubber causing strange noises and water leaks. Owners should avoid spraying water directly at the joints when washing the car. The advantages are smooth and aesthetically pleasing door operation, being lighter than framed doors and reducing blind spots. However, maintenance requires special parts which are more expensive, though regular cleaning can extend their lifespan. Compared to models like the Toyota Camry, it offers a stronger sporty feel while prioritizing safety.


