2009 Mercedes-Benz Multego

The 2009 Mercedes-Benz ML350 is a mid-size luxury SUV that offers a blend of comfort, performance, and style. It was available with several engine options, including a 3.5L V6 gasoline engine producing 268 horsepower and 258 lb-ft of torque, and a 3.0L V6 diesel engine. Transmission options typically included a 7-speed automatic. Owners often appreciate the ML350 for its smooth ride, luxurious interior, and strong performance. However, some common complaints include electrical issues, suspension problems, and certain engine-related concerns.

Engine

3.5L V6 Gasoline Engine

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: Engine may experience rough idling, misfires, and a check engine light. Error codes P0016 and P0017 may be present.
  • Solution: Replace the faulty camshaft adjuster solenoid.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found
• Oil Leaks from Valve Cover Gaskets
  • Description/Symptoms: Oil may leak onto the exhaust manifold, causing a burning smell. Visible oil accumulation may be present around the valve covers.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found

Transmission

7-Speed Automatic Transmission (7G-Tronic)

• Torque Converter Issues
  • Description/Symptoms: Shuddering during acceleration, particularly at lower speeds. May also experience difficulty shifting.
  • Solution: Replace or rebuild the torque converter.
  • Estimated Cost to Fix: $1,500 - $4,000+
  • Recalls: None Found
• Valve Body Problems
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears, or failure to shift at all.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $800 - $2,500+
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure (if equipped)
  • Description/Symptoms: Vehicle sags or lowers unevenly, particularly overnight. “Malfunction” message appears on the dashboard. Air suspension system may become completely inoperable.
  • Solution: Replace the air suspension compressor.
  • Estimated Cost to Fix: $800 - $1,800+
  • Recalls: None Found
• Air Strut Leaks (if equipped)
  • Description/Symptoms: Similar to compressor failure, but the issue is a leak in one or more of the air struts. Hissing sound may be heard near the affected strut.
  • Solution: Replace the leaking air strut(s).
  • Estimated Cost to Fix: $600 - $1,500+ per strut
  • Recalls: None Found

Electrical

• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Various electrical malfunctions, including issues with lights, wipers, windows, and door locks. May also cause the vehicle to not start.
  • Solution: Replace the faulty SAM unit.
  • Estimated Cost to Fix: $600 - $1,500+
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Battery repeatedly drains, especially after the vehicle sits for a few days.
  • Solution: Diagnose and repair the parasitic draw, which may involve replacing a faulty module or component.
  • Estimated Cost to Fix: $200 - $1,000+ (depending on the source of the drain)
  • Recalls: None Found

Exterior

• Rust on wheel arches or door bottoms
  • Description/Symptoms: Bubbling or rust appearing on the edges of wheel arches or the bottom of the doors.
  • Solution: Repair and repaint the affected area or replace the panel completely.
  • Estimated Cost to Fix: $300 - $2,000+ depending on the severity.
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof fails to open or close properly, gets stuck, or makes excessive noise.
  • Solution: Repair or replace the sunroof motor, tracks, or related components.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found

Summary

The 2009 Mercedes-Benz ML350, while a luxurious and capable SUV, can suffer from a range of issues. The most common complaints revolve around the engine, transmission, suspension, and electrical systems. Repair costs can range from a few hundred dollars for minor fixes to several thousand dollars for major component replacements. Potential buyers should have a pre-purchase inspection performed by a qualified mechanic to identify any existing or potential problems. The air suspension system, if equipped, is a known area of concern due to the relatively high failure rate of the compressor and struts, be sure to specifically inspect the operation and condition of the system.