2007 Mercedes-Benz E320

The 2007 Mercedes-Benz E320 is a popular luxury sedan known for its comfortable ride, elegant styling, and advanced features for its time. The E320 was available with a 3.2L V6 diesel engine producing 210 horsepower and 388 lb-ft of torque. The E-Class series was praised for its solid build quality and smooth driving experience. Some common complaints included higher maintenance costs compared to non-luxury brands and occasional electrical issues. Other engine options include a 3.5L gasoline V6 producing 268 horsepower and a 5.5L gasoline V8 producing 382 horsepower.

Engine

3.2L Diesel V6 (OM642)

• Oil Cooler Leaks
  • Description/Symptoms: Oil leaks, often dripping onto the ground. May also notice a burning smell.
  • Solution: Replacement of the oil cooler seals.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found
• Turbo Actuator Failure
  • Description/Symptoms: Loss of power, limp mode, check engine light.
  • Solution: Replacement of the turbo actuator or the entire turbocharger assembly.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found
• Swirl Flap Motor Failure
  • Description/Symptoms: Check engine light, poor performance, rough idle.
  • Solution: Replacement of the swirl flap motor or intake manifold. Some owners opt for a delete kit.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Transmission

722.9 7-Speed Automatic

• Valve Body Issues
  • Description/Symptoms: Harsh shifting, slipping, delayed engagement, getting stuck in gear or no shifting at all.
  • Solution: Replacement of the valve body or individual solenoids.
  • Estimated Cost to Fix: $800 - $2500+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering, vibrations, especially at lower speeds.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $1000 - $3000+
  • Recalls: None Found
• Conductor Plate Failure
  • Description/Symptoms: Transmission stuck in limp mode (usually second gear), check engine light.
  • Solution: Replacement of the conductor plate.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Suspension

• Airmatic Suspension Problems (If Equipped)
  • Description/Symptoms: Car sitting low on one side or all corners, compressor running constantly, suspension malfunction warning light.
  • Solution: Replacement of air struts, air compressor, or valve block.
  • Estimated Cost to Fix: $800 - $2000+ per strut, $500 - $1000+ for compressor
  • Recalls: None Found
• Ball Joint Failure
  • Description/Symptoms: Clunking noises from the front suspension, uneven tire wear, loose steering.
  • Solution: Replacement of the ball joints (often requires replacing the entire control arm).
  • Estimated Cost to Fix: $300 - $800+ per side
  • Recalls: None Found

Electrical

• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: Key not recognized, car won’t start, steering wheel not unlocking.
  • Solution: Replacement of the EIS module.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• SAM (Signal Acquisition Module) Issues
  • Description/Symptoms: Malfunctioning lights, wipers, or other electrical components.
  • Solution: Replacement of the affected SAM unit (front or rear).
  • Estimated Cost to Fix: $500 - $1200+
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Car battery frequently dead or requiring frequent charging.
  • Solution: Diagnose and repair the source of the parasitic drain (can be difficult to pinpoint).
  • Estimated Cost to Fix: $100 - $500+ (depending on the cause)
  • Recalls: None Found

Exterior

• Rust Issues
  • Description/Symptoms: Rust bubbling or corrosion, particularly around the wheel arches, door seams, and trunk lid.
  • Solution: Rust repair or panel replacement.
  • Estimated Cost to Fix: $300 - $2000+ (depending on severity)
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, making excessive noise, or leaking.
  • Solution: Repair or replacement of sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found
• Climate Control Issues
  • Description/Symptoms: AC blowing warm air, heater not working, inconsistent temperature control.
  • Solution: Recharge AC, replace compressor, replace heater core or control module.
  • Estimated Cost to Fix: $100-$1500+
  • Recalls: None Found

Summary

The 2007 Mercedes-Benz E320, while a luxurious and comfortable vehicle, can be prone to certain issues, particularly related to its diesel engine, transmission, air suspension (if equipped), and electrical systems. These issues can range from relatively inexpensive fixes like replacing seals to more costly repairs such as replacing the valve body or turbocharger. Rust is also a common concern, especially in areas with harsh winters. Potential buyers should have the vehicle thoroughly inspected by a qualified mechanic, paying particular attention to these common problem areas. The severity of these problems can vary greatly, and repair costs can be significant, making pre-purchase inspection crucial.