2021 Mercedes-Benz MBO 1421

Introduction

The 2021 Mercedes-Benz MBO 1421 is a heavy-duty truck with a powerful engine and advanced engineering. The MBO 1421 is powered by a 12.8-liter inline-6 engine producing 425 horsepower and 1,450 lb.-ft. of torque. It features a 12-speed automated transmission with manual and automatic modes.

Despite its impressive specifications, the 2021 MBO 1421 has encountered various issues reported by owners and reviewers.

Engine

• 12.8-Liter Inline-6 Engine
  • Fuel Injector Failure:
    • Description/Symptoms: Difficulty starting, engine misfiring, decreased performance.
    • Solution: Replacing faulty fuel injectors.
    • Estimated Cost to Fix: $1,000 - $2,500
    • Recalls: None Found
  • Turbocharger Overheating:
    • Description/Symptoms: Smoke from engine bay, reduced power, engine warning lights.
    • Solution: Repairing or replacing turbocharger.
    • Estimated Cost to Fix: $2,000 - $5,000
    • Recalls: None Found

Transmission

• 12-Speed Automated Transmission
  • Transmission Fluid Leaks:
    • Description/Symptoms: Dripping fluid under the transmission, gear slippage, difficulty shifting.
    • Solution: Replacing transmission fluid and seals.
    • Estimated Cost to Fix: $500 - $1,500
    • Recalls: None Found

Suspension

• No Issues Found

Electrical

• Battery Discharge:
  • Description/Symptoms: Difficulty starting, warning messages, electrical components not functioning.
  • Solution: Replacing or repairing alternator or battery.
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found
• Wiring Harness Issues:
  • Description/Symptoms: Electrical faults, intermittent power loss, warning lights.
  • Solution: Inspecting and repairing damaged wiring.
  • Estimated Cost to Fix: $500 - $2,000
  • Recalls: None Found

Exterior

• Door Handle Corrosion:
  • Description/Symptoms: Door handles corroding and becoming difficult to operate.
  • Solution: Replacing door handles.
  • Estimated Cost to Fix: $200 - $500
  • Recalls: None Found
• Headlight Condensation:
  • Description/Symptoms: Moisture accumulation inside headlights.
  • Solution: Replacing headlight housing or gaskets.
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found

Interior

• Climate Control Malfunction:
  • Description/Symptoms: Air conditioning or heating not functioning properly.
  • Solution: Diagnosing and repairing climate control system.
  • Estimated Cost to Fix: $500 - $1,500
  • Recalls: None Found
• Instrument Panel Errors:
  • Description/Symptoms: Faulty instrument readings, warning lights remaining on.
  • Solution: Software update or replacing instrument panel.
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found

Summary

The 2021 Mercedes-Benz MBO 1421 has various reported issues across several components. Although some issues are minor and inexpensive to resolve, others can be more severe and costly to fix. Overall, the reliability of this truck is concerning for a vehicle of its caliber and price range.