2024 Mercedes-Benz E450

The 2024 Mercedes-Benz E450 is a mid-size luxury sedan known for its elegant design, refined driving experience, and advanced technology. It’s offered with a 3.0L inline-6 turbo engine with mild hybrid drive, producing 375 horsepower and 369 lb-ft of torque. Some owners appreciate its smooth ride, quiet cabin, and upscale interior, while others find the infotainment system complex and the optional features expensive.

Engine

3.0L Inline-6 Turbo (M256)

• Malfunctioning Auxiliary Coolant Pump
  • Description/Symptoms: Overheating, especially during demanding driving conditions. Check engine light may illuminate. Diagnostic trouble codes (DTCs) related to the auxiliary coolant pump circuit can be present.
  • Solution: Replacement of the faulty auxiliary coolant pump.
  • Estimated Cost to Fix: $400 - $700+
  • Recalls: None Found
• Oil Leaks from Valve Cover Gasket
  • Description/Symptoms: Oil leaks are noticeable around the valve cover area. Burning oil smell may be present. Low engine oil level may be observed.
  • Solution: Replacement of the valve cover gasket.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic (725.0)

• Rough or Delayed Shifting
  • Description/Symptoms: Harsh or jerky gear changes, hesitation when accelerating, and noticeable delays when shifting between drive and reverse.
  • Solution: Software update of the transmission control module (TCM) or, in severe cases, replacement of the valve body.
  • Estimated Cost to Fix: $200 - $400 (software update), $1500 - $3000+ (valve body replacement)
  • Recalls: None Found
• Transmission Fluid Leak
  • Description/Symptoms: Leakage of transmission fluid underneath the vehicle. Difficult shifting, slipping, or failure to engage gears may be present.
  • Solution: Replacement of the leaking transmission seal or gasket.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions (If Equipped)
  • Description/Symptoms: Vehicle sagging on one or more corners, uneven ride height, error messages related to the air suspension system. Compressor might run constantly.
  • Solution: Replacement of the air struts, air compressor, or ride height sensors.
  • Estimated Cost to Fix: $1000 - $3000+ per corner for strut replacement, $800 - $1500+ for compressor replacement
  • Recalls: None Found

Electrical

• MBUX Infotainment System Freezing/Crashing
  • Description/Symptoms: The MBUX system freezes, becomes unresponsive, or crashes and restarts unexpectedly. Issues with navigation, media playback, or connectivity may occur.
  • Solution: Software update of the MBUX system. If the problem persists, replacement of the MBUX head unit may be necessary.
  • Estimated Cost to Fix: $0 (software update), $1500 - $3000+ (head unit replacement)
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Various sensor failures including Parking sensors, Blind Spot Monitoring, Adaptive Cruise Control, or Lane Keep Assist malfunctioning or providing inaccurate information. Error messages displayed on the instrument cluster.
  • Solution: Replacement of the faulty sensor(s).
  • Estimated Cost to Fix: $200 - $800+ per sensor
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Battery drains while the vehicle is not in use, resulting in difficulty starting or a dead battery.
  • Solution: Diagnosis and repair of parasitic drain. This may involve identifying and replacing a faulty module or component.
  • Estimated Cost to Fix: $150 - $500+ for diagnosis, $200 - $1000+ for repair.
  • Recalls: None Found

Exterior

• Problems with the Panoramic Sunroof
  • Description/Symptoms: The panoramic sunroof may experience difficulty opening or closing, produce excessive noise, or leak water.
  • Solution: Lubrication of the sunroof tracks, repair or replacement of the sunroof motor, or replacement of the sunroof seal.
  • Estimated Cost to Fix: $100 - $300+ (lubrication), $500 - $1500+ (motor replacement), $300 - $800+ (seal replacement)
  • Recalls: None Found

Interior

• Creaking/Rattling Noises
  • Description/Symptoms: Annoying creaking or rattling noises emanating from the dashboard, door panels, or seats.
  • Solution: Identification and insulation of the source of the noise. This may involve tightening loose fasteners, adding padding or foam, or replacing worn components.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary:

The 2024 Mercedes-Benz E450, while lauded for its luxury and performance, can present owners with a range of issues. The most common complaints involve the MBUX infotainment system, with electrical problems and suspension issues also being prevalent. Engine and transmission problems seem less frequent, but can still occur. The severity of these issues varies, ranging from minor annoyances to potentially costly repairs. While most repairs fall in the hundreds of dollars range, some could require thousands, so it is important to be aware of the problems when considering buying this vehicle.