2003 Mercedes-Benz ML320

Introduction

The 2003 Mercedes-Benz ML320 is a mid-size luxury SUV powered by a 3.2-liter V6 engine generating 215 horsepower and 229 lb-ft of torque. It came with a standard 5-speed automatic transmission and optional 4MATIC all-wheel drive. The ML320 was praised for its premium interior, comfortable ride, and off-road capabilities, but criticized for its lackluster performance and fuel economy.

Engine

3.2L V6

• Cam Adjuster Failure
  • Description/Symptoms: Engine misfires, rough idle, reduced power, increased fuel consumption
  • Solution: Replace the cam adjusters
  • Estimated Cost to Fix: $1,000 - $2,500+
  • Recalls: None Found
• Intake Manifold Swirl Flap Failure
  • Description/Symptoms: Airflow restriction, reduced power, engine stalling
  • Solution: Replace the intake manifold
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Transmission

5-Speed Automatic

• Transmission Slippage
  • Description/Symptoms: Vehicle hesitates or slips during acceleration, difficulty shifting gears
  • Solution: Overhaul or replace the transmission
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found

Suspension

• Front Suspension Bushing Failure
  • Description/Symptoms: Excessive noise, vibration, and handling instability during driving
  • Solution: Replace the suspension bushings
  • Estimated Cost to Fix: $200 - $500
  • Recalls: None Found
• Rear Air Suspension Failure
  • Description/Symptoms: Vehicle sags or leans to one side, reduced ground clearance, uncomfortable ride
  • Solution: Replace the air suspension components (e.g., compressor, struts)
  • Estimated Cost to Fix: $500 - $2,000+
  • Recalls: None Found

Electrical

• Alternator Failure
  • Description/Symptoms: Battery discharge, dim headlights, engine stalling
  • Solution: Replace the alternator
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found
• Window Regulator Failure
  • Description/Symptoms: Window stuck or slow to open/close, clicking noises
  • Solution: Replace the window regulator
  • Estimated Cost to Fix: $300 - $500
  • Recalls: None Found

Exterior

• Tailgate Liftgate Failure
  • Description/Symptoms: Tailgate opens or closes slowly or not at all
  • Solution: Replace the tailgate liftgate struts or hinges
  • Estimated Cost to Fix: $200 - $700
  • Recalls: None Found

Interior

• Climate Control Malfunction
  • Description/Symptoms: AC or heater failure, erratic temperature control
  • Solution: Diagnose and repair the climate control system
  • Estimated Cost to Fix: $200 - $700
  • Recalls: None Found

Summary

The 2003 Mercedes-Benz ML320 has some known issues that can be costly to repair. Common problems include cam adjuster failure, intake manifold swirl flap failure, transmission slippage, suspension bushing failure, and electrical issues. While the vehicle offers a luxurious ride and off-road capabilities, potential buyers should be aware of the potential costs associated with these potential issues.