2014 Mercedes-Benz SLS AMG

The 2014 Mercedes-Benz SLS AMG is a front-engine, rear-wheel-drive grand tourer known for its iconic gullwing doors and powerful performance. It was offered in coupe and roadster variants. The SLS AMG is powered by a hand-built 6.2-liter naturally aspirated V8 engine producing 583 horsepower and 479 lb-ft of torque. A seven-speed dual-clutch transmission sends power to the rear wheels. The SLS AMG is celebrated for its stunning design, exhilarating acceleration, and distinctive exhaust note. However, some owners have reported issues ranging from minor annoyances to more significant mechanical problems. Common complaints often include concerns regarding the transmission, suspension, and electrical systems.

Engine

6.2L Naturally Aspirated V8

• Oil Leaks
  • Description/Symptoms: Oil leaks are sometimes reported, often originating from the valve cover gaskets or the rear main seal. Symptoms include visible oil drips under the car, a burning oil smell, and low oil levels.
  • Solution: Replacing the leaking gaskets or seals.
  • Estimated Cost to Fix: $500 - $1500+ depending on the location and severity of the leak.
  • Recalls: None Found
• Camshaft Adjuster Issues
  • Description/Symptoms: Occasional reports of camshaft adjuster failures, leading to rough idling, reduced power, and potential engine misfires.
  • Solution: Replacement of the faulty camshaft adjusters.
  • Estimated Cost to Fix: $2000 - $4000+
  • Recalls: None Found

Transmission

7-Speed Dual-Clutch Transmission

• Jerky Shifting/Clunking Noises
  • Description/Symptoms: Some owners have experienced jerky shifting, particularly at low speeds, and clunking noises during gear changes.
  • Solution: Transmission software update, clutch pack replacement, or mechatronic unit repair/replacement.
  • Estimated Cost to Fix: $500 (software update) - $8,000+ (clutch pack/mechatronic unit).
  • Recalls: None Found
• Transmission Mount Failure
  • Description/Symptoms: Premature failure of the transmission mount is not uncommon, leading to increased vibrations and clunking noises during acceleration and deceleration.
  • Solution: Replacement of the transmission mount.
  • Estimated Cost to Fix: $400 - $800
  • Recalls: None Found

Suspension

• Air Suspension Issues (If Equipped)
  • Description/Symptoms: Some SLS AMGs were equipped with an optional air suspension system. Issues can arise with the air struts, compressor, or air lines, leading to a sagging vehicle, uneven ride height, and error messages.
  • Solution: Replacement of the faulty air strut, compressor, or repair of the air lines.
  • Estimated Cost to Fix: $1000 - $3000+ per strut, $800 - $1500+ for the compressor.
  • Recalls: None Found
• Damper Control Unit Failure (If Equipped)
  • Description/Symptoms: If equipped with adjustable dampers, the control unit can fail, resulting in a stiff or unpredictable ride. Warning lights related to suspension may also appear.
  • Solution: Replacement of the damper control unit.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Some owners have reported issues with excessive battery drain, particularly when the car is left unused for extended periods. This can lead to difficulty starting the car.
  • Solution: Identifying and repairing the source of the parasitic draw (e.g., faulty module, improperly closing trunk light).
  • Estimated Cost to Fix: $100 - $500+ depending on the cause.
  • Recalls: None Found
• Gullwing Door Issues
  • Description/Symptoms: The electric locking mechanism for the gullwing doors may fail, preventing the doors from opening or closing properly.
  • Solution: Repair or replacement of the door locking mechanism or associated wiring.
  • Estimated Cost to Fix: $500 - $2000+ depending on the specific issue.
  • Recalls: None Found

Exterior

• Gullwing Door Struts
  • Description/Symptoms: The gas struts that assist in opening and closing the gullwing doors can weaken over time, causing the doors to become difficult to operate or not stay fully open.
  • Solution: Replacement of the gas struts.
  • Estimated Cost to Fix: $500 - $1000+ per door.
  • Recalls: None Found

Interior

• Navigation/Infotainment System Issues
  • Description/Symptoms: The COMAND infotainment system can experience glitches, software freezes, or failure of the navigation system.
  • Solution: Software update, replacement of the COMAND unit.
  • Estimated Cost to Fix: $100 - $500 (software) to $1500 - $3000+ (replacement).
  • Recalls: None Found

Summary

The 2014 Mercedes-Benz SLS AMG, while a stunning and high-performing vehicle, can suffer from a range of issues. Engine oil leaks and transmission problems appear to be the most significant mechanical concerns. Electrical gremlins, particularly related to battery drain and gullwing door operation, are also reported. Suspension issues, if the car is equipped with air suspension, can add to the maintenance costs. The severity of these issues varies, but the cost of repairs can be substantial, especially considering the specialized nature of the car. Prospective buyers should have a pre-purchase inspection performed by a qualified mechanic familiar with SLS AMG models.