2023 Mercedes-Benz CLS450

The 2023 Mercedes-Benz CLS450 is a sleek and stylish four-door coupe known for its luxurious features and comfortable ride. Its engine is a 3.0-liter inline-6 turbo with mild hybrid drive, producing 362 horsepower and 369 lb-ft of torque. The CLS450 is equipped with a 9G-TRONIC 9-speed automatic transmission. People often praise its elegant design, opulent interior, and advanced technology. Common dislikes include the limited rear headroom due to the sloping roofline and some user interface complexities within the infotainment system. Other engines and transmissions were not offered on the 2023 CLS450.

Engine

3.0L Inline-6 Turbo with Mild Hybrid Drive

• Rough Idle/Stalling
  • Description/Symptoms: Some owners have reported a rough idle, particularly at startup or when the engine is cold. In some cases, this can lead to stalling. The issue might be intermittent.
  • Solution: The issue could stem from the mild hybrid system’s integration, possibly involving the Integrated Starter Generator (ISG) or related control software. A diagnostic scan by a Mercedes-Benz technician is crucial. Software updates or replacement of faulty components may be needed.
  • Estimated Cost to Fix: $200 - $1,000+ depending on the specific component and labor.
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic Transmission

• Harsh Shifting
  • Description/Symptoms: Some owners have reported harsh or jerky shifting, particularly between lower gears. This can manifest as a noticeable “clunk” or “jolt” during gear changes.
  • Solution: The issue may be related to the transmission’s adaptive learning software or valve body issues. A software reflash or valve body replacement may be necessary. Fluid level should also be checked.
  • Estimated Cost to Fix: $300 - $2,000+ depending on the specific repair needed
  • Recalls: None Found

Electrical

• MBUX Infotainment System Glitches
  • Description/Symptoms: Occasional freezing, lagging, or unexpected reboots of the MBUX infotainment system. Issues can also manifest as connectivity problems with Apple CarPlay or Android Auto.
  • Solution: Try restarting the system. Check for available software updates from Mercedes-Benz. In some cases, a hardware replacement of the MBUX unit might be needed.
  • Estimated Cost to Fix: $0 (software updates) - $1,500+ (hardware replacement).
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Various sensors, such as parking sensors or those related to driver-assist features (lane keep assist, blind-spot monitoring), may intermittently fail or provide false alerts.
  • Solution: A diagnostic scan is needed to identify the faulty sensor. Replacement of the affected sensor is the most common solution.
  • Estimated Cost to Fix: $200 - $800+ depending on the sensor.
  • Recalls: None Found

Interior

• Sunroof Rattling/Squeaking
  • Description/Symptoms: Rattling or squeaking noises emanating from the sunroof area, particularly when driving on uneven surfaces.
  • Solution: Cleaning and lubricating the sunroof tracks and seals can sometimes resolve the issue. If the problem persists, the sunroof mechanism may need adjustment or replacement.
  • Estimated Cost to Fix: $50 - $500+ depending on complexity.
  • Recalls: None Found

Exterior

• Automatic Tailgate Malfunction
  • Description/Symptoms: The automatic tailgate failing to open or close properly, or getting stuck mid-operation. This could be due to issues with the motor, sensors, or struts.
  • Solution: A diagnostic check to determine the cause of the malfunction. Replacement of the faulty component (motor, sensor, strut) is the typical fix.
  • Estimated Cost to Fix: $300 - $1,000+ depending on the failed component.
  • Recalls: None Found

Suspension

• Air Suspension Issues (if equipped)
  • Description/Symptoms: If equipped with the optional air suspension, owners have reported issues such as the car not maintaining the correct ride height, uneven suspension, or a complete failure of the system.
  • Solution: Diagnosing the problem with a scan tool can pinpoint the issue. Usually, the air struts, air compressor or solenoids are the culprit.
  • Estimated Cost to Fix: $800 - $3,000+ depending on the failed components.
  • Recalls: None Found

Summary:

The 2023 Mercedes-Benz CLS450, while praised for its style and luxury, exhibits a range of potential issues. The severity and cost of these issues vary significantly. Electrical glitches and sensor malfunctions appear to be relatively common, while engine and transmission issues, though less frequent, can be more costly to address. Air suspension issues (if equipped) can also lead to significant repair bills. Potential buyers should be aware of these potential problems and consider a thorough inspection before purchasing.