2019 Mercedes-Benz E450

The 2019 Mercedes-Benz E450 is a luxury sedan, coupe, cabriolet, and wagon known for its comfortable ride, elegant interior, and advanced technology. The E450 is equipped with a 3.0-liter turbocharged V6 engine that produces 362 horsepower and 369 lb-ft of torque. All models are paired with a 9G-TRONIC 9-speed automatic transmission. Some owners praise the E450 for its smooth engine, spacious cabin, and long list of available features. Common complaints include the complicated infotainment system, and some electrical glitches. Other engine options for the E-Class in 2019 include the E300 with a 2.0L turbocharged inline-4 and AMG E63 with a 4.0L Biturbo V8.

Engine

3.0L Turbocharged V6 (M276)

• Oil Leaks from Timing Chain Cover
  • Description/Symptoms: Oil leaking from the front of the engine, near the timing chain cover. This can cause a burning smell and low oil levels.
  • Solution: Replacement of the timing chain cover gasket, and resealing the timing chain cover.
  • Estimated Cost to Fix: $1,200 - $2,000+
• Turbocharger Failure
  • Description/Symptoms: Whining or screeching noises from the engine, loss of power, check engine light.
  • Solution: Replacement of the faulty turbocharger(s).
  • Estimated Cost to Fix: $2,500 - $4,000+

Transmission

9G-TRONIC 9-Speed Automatic (725.0)

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or jerky shifting, especially between lower gears. Hesitation when accelerating.
  • Solution: Software update to the transmission control module (TCM), or replacement of valve body.
  • Estimated Cost to Fix: $200 - $500 for software update, $1,500 - $3,000+ for valve body replacement.
• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibration at low speeds, particularly during light acceleration.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $2,000 - $4,000+

Suspension

• Air Suspension Failure (if equipped)
  • Description/Symptoms: Vehicle sagging on one or more corners, air compressor running constantly, “Vehicle Too Low” warning light.
  • Solution: Replacement of the faulty air strut(s) or air compressor.
  • Estimated Cost to Fix: $1,500 - $3,000+ per strut, $1,000 - $2,000+ for compressor.

Electrical

• MBUX Infotainment System Glitches
  • Description/Symptoms: Freezing, lagging, or rebooting of the MBUX system. Issues with navigation, audio, or other connected services.
  • Solution: Software update, replacement of the head unit (in some cases).
  • Estimated Cost to Fix: $0 (if software update), $1,000 - $3,000+ for head unit replacement.
• Battery Drain
  • Description/Symptoms: Dead battery after short periods of inactivity.
  • Solution: Diagnose parasitic drain and repair or replace the faulty component. Common culprits include the infotainment system, seat control modules, or alarm system.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the cause.
• Sensor Malfunctions
  • Description/Symptoms: Faulty reading of parking sensors, blind spot monitoring, and other sensors, leading to error messages.
  • Solution: Replacement of the affected sensor.
  • Estimated Cost to Fix: $300 - $800+ per sensor.

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, sticking, or making excessive noise.
  • Solution: Repair or replacement of the sunroof motor, track, or regulator.
  • Estimated Cost to Fix: $500 - $1,500+
• Seat Motor Failure
  • Description/Symptoms: The seat no longer moves forwards, backward, up, or down.
  • Solution: Replacement of the faulty seat motor.
  • Estimated Cost to Fix: $400 - $1,200+

Recalls

• Recall: 2020030008 - RECALL OF CERTAIN 2019-2020 MY CLA, CLS, AND E-CLASS VEHICLES EQUIPPED WITH M260/M264/M256 ENGINES DUE TO A MISSING GROUND CONNECTION

Summary The 2019 Mercedes-Benz E450 presents a mix of potential issues, ranging from relatively minor electrical glitches to more significant engine and transmission problems. Electrical issues, particularly with the MBUX system, are a common annoyance. Engine oil leaks and turbocharger issues, while less frequent, can lead to substantial repair costs. Similarly, transmission problems such as rough shifting can be costly to resolve, especially if a valve body or torque converter replacement is required. Air suspension failures, if equipped, can add to the maintenance burden. While not every E450 will experience these issues, potential buyers should be aware of these common complaints and factor them into their purchasing decision.