2010 Mercedes-Benz S500

The 2010 Mercedes-Benz S500 is a luxury sedan renowned for its comfort, technology, and powerful performance. The S500 comes standard with a 5.5L V8 engine producing 382 horsepower and 391 lb-ft of torque, paired with a 7-speed automatic transmission (7G-TRONIC). While owners appreciate the smooth ride, luxurious interior, and advanced features, some common complaints include issues with the air suspension, electrical malfunctions, and costly repairs. Dislikes often stem from the high maintenance costs associated with owning a high-end luxury vehicle, as well as the complexity of the electronic systems. Other engine options available were the S400 Hybrid (3.5L V6) and the S600 (5.5L Twin-Turbo V12).

Engine

5.5L V8 (M273)

• Oil Leaks
  • Description/Symptoms: Oil leaks are common, particularly from the valve cover gaskets, oil filter housing gasket, and front crankshaft seal. Symptoms include visible oil leaks on the engine, oil drips on the ground, and a burning oil smell.
  • Solution: Replacement of the faulty gaskets or seals.
  • Estimated Cost to Fix: $200 - $800+ depending on the location of the leak and the extent of labor involved.
  • Recalls: None Found
• Camshaft Adjuster Solenoid Issues
  • Description/Symptoms: The camshaft adjuster solenoids (also known as variable valve timing solenoids) can fail, leading to rough idling, poor performance, and check engine lights.
  • Solution: Replacement of the faulty camshaft adjuster solenoid(s).
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Transmission

7G-TRONIC (722.9)

• Torque Converter Failure
  • Description/Symptoms: Hesitation when accelerating from a stop or low speeds, shuddering, and/or slipping during gear changes.
  • Solution: Torque converter replacement.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Hard or erratic shifting, delayed engagement of gears, and potential for complete transmission failure.
  • Solution: Replacement or rebuild of the valve body.
  • Estimated Cost to Fix: $800 - $2,000+
  • Recalls: None Found

Suspension

• Airmatic System Failure
  • Description/Symptoms: The Airmatic air suspension system is prone to leaks and component failures. Symptoms include the car sitting low on one or more corners, a loud hissing sound from the air struts or compressor, and error messages on the dashboard.
  • Solution: Replacement of faulty air struts, air compressor, or valve block.
  • Estimated Cost to Fix: $800 - $2,500+ per strut, $500-$1500+ for the compressor
  • Recalls: None Found

Electrical

• COMAND System Malfunctions
  • Description/Symptoms: The COMAND system (Mercedes’ infotainment system) can experience glitches, freezing, and complete failure. This can affect navigation, audio, and other vehicle functions.
  • Solution: Software updates, component replacement (e.g., head unit).
  • Estimated Cost to Fix: $200 - $2,000+ depending on the issue and repair needed.
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Excessive battery drain can occur due to faulty modules or components that do not shut down properly. This can lead to a dead battery and difficulty starting the car.
  • Solution: Diagnose and replace the faulty component causing the battery drain (e.g., door control module, seat control module).
  • Estimated Cost to Fix: $100 - $1,000+ depending on the faulty component.
  • Recalls: None Found

Exterior

• Headlight Condensation
  • Description/Symptoms: Moisture build-up inside the headlight housings, causing reduced visibility and potential damage to the headlight components.
  • Solution: Seal the headlight housing, replace the headlight assembly.
  • Estimated Cost to Fix: $200 - $1,000+ per headlight depending on whether resealing is possible or if replacement is necessary.
  • Recalls: None Found
• Sunroof Issues
  • Description/Symptoms: Sunroof malfunctions, including failure to open/close properly, unusual noises, and leaks.
  • Solution: Lubrication, repair or replacement of sunroof motor or track components.
  • Estimated Cost to Fix: $100 - $1,500+ depending on the specific problem.
  • Recalls: None Found

Interior

• Seat Motor Failure
  • Description/Symptoms: Failure of the power seat motors, preventing adjustment of the seats.
  • Solution: Replacement of the faulty seat motor.
  • Estimated Cost to Fix: $300 - $800+ per motor.
  • Recalls: None Found
• Dashboard Delamination
  • Description/Symptoms: The dashboard material separates from the underlying structure, creating bubbles or a peeling effect. This is more common in hot climates.
  • Solution: Dashboard replacement or repair (e.g., re-gluing).
  • Estimated Cost to Fix: $500 - $2,000+ depending on the repair method and the extent of the damage.
  • Recalls: None Found

Summary:

The 2010 Mercedes-Benz S500 is a luxurious vehicle, but owners should be aware of the potential for costly repairs. The most common issues involve the air suspension, transmission, and electrical systems. While some issues are relatively minor, others can be quite expensive to fix. Potential buyers should have the vehicle inspected by a qualified mechanic prior to purchase and be prepared for ongoing maintenance costs.