2017 Mercedes-Benz E400

The 2017 Mercedes-Benz E400 is a mid-size luxury sedan known for its comfortable ride, elegant interior, and advanced technology. It’s equipped with a 3.0L Turbocharged V6 engine producing 329 horsepower and 354 lb-ft of torque. Other engine options in the E-Class range include a 2.0L Turbocharged Inline-4 in the E300 and a handcrafted AMG 4.0L V8 biturbo in the E63 S. All engine options are paired with a 9G-TRONIC 9-speed automatic transmission. Owners generally praise the E400 for its smooth ride, powerful engine, and luxurious features. Common complaints include the complexity of the infotainment system and occasional electronic glitches.

Engine

3.0L Turbocharged V6

• Oil Leaks from Turbocharger Oil Lines
  • Description/Symptoms: Oil leaks originating from the turbocharger oil supply and return lines. This can lead to oil consumption, burning smell, and potential engine damage if left unaddressed.
  • Solution: Replace the faulty turbocharger oil lines with updated parts.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Engine Mount Failure
  • Description/Symptoms: Excessive engine vibration, clunking noises during acceleration or deceleration, and noticeable engine movement.
  • Solution: Replace the failing engine mounts.
  • Estimated Cost to Fix: $600 - $1200
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic (725.0)

• Rough Shifting/Hesitation
  • Description/Symptoms: Hesitation during shifting, particularly between lower gears. Occasional harsh or jerky shifts.
  • Solution: Software update to the transmission control module (TCM). In some cases, valve body replacement may be necessary.
  • Estimated Cost to Fix: $200 (Software Update) - $2000+ (Valve Body Replacement)
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibration at low speeds, particularly during light acceleration. Can also manifest as a delay in engagement when shifting into drive or reverse.
  • Solution: Replace the torque converter with an updated design.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

Suspension

• Air Suspension Failure (If Equipped)
  • Description/Symptoms: Vehicle sagging on one or more corners, air compressor running excessively, “Vehicle Level Too Low” warning message.
  • Solution: Diagnose and replace the faulty components, which may include air struts, air compressor, or air lines.
  • Estimated Cost to Fix: $800 - $2500+ per strut, $500 - $1500+ for compressor.
  • Recalls: None Found

Electrical

• COMAND Infotainment System Issues
  • Description/Symptoms: System freezing, unresponsive touchscreen, Bluetooth connectivity problems, navigation malfunctions, or complete system failure.
  • Solution: Software update, replacement of the COMAND unit.
  • Estimated Cost to Fix: $150 - $500 (Software Update) - $1500 - $3000+ (COMAND Unit Replacement)
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Dead battery after short periods of inactivity, difficulty starting the car, warning messages related to low voltage.
  • Solution: Diagnose and address parasitic drain, which could be caused by a faulty module or component. Replace the battery if necessary.
  • Estimated Cost to Fix: $150 - $500+ (Diagnosis), $200 - $400+ (Battery Replacement)
  • Recalls: None Found

Exterior

• Sunroof Issues
  • Description/Symptoms: Sunroof jams, fails to open or close properly, or makes excessive noise during operation. Water leaks may also occur.
  • Solution: Inspect and clean sunroof tracks, lubricate moving parts, or replace faulty sunroof motor or components.
  • Estimated Cost to Fix: $200 - $1000+
  • Recalls: None Found

Interior

• Dashboard Delamination
  • Description/Symptoms: The upper dashboard material begins to separate or peel away from the underlying structure, particularly in areas exposed to direct sunlight.
  • Solution: Replacement of the dashboard.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

Summary: The 2017 Mercedes-Benz E400, while a luxurious and capable vehicle, has some common issues that potential buyers should be aware of. Engine oil leaks, transmission issues, and electrical glitches are among the most frequently reported problems. The severity of these issues ranges from minor inconveniences to potentially costly repairs. Addressing these problems promptly can help maintain the vehicle’s performance and reliability. The cost of repairs can vary widely depending on the specific issue and the repair shop.