2014 Mercedes-Benz SLK350

The 2014 Mercedes-Benz SLK350 is a stylish and sporty roadster that offers a blend of luxury and performance. The SLK350 is equipped with a 3.5-liter V6 engine producing 302 horsepower and 273 lb-ft of torque, paired with a 7-speed automatic transmission. Some owners appreciate the car’s retractable hardtop, comfortable interior, and agile handling. However, some common dislikes include the sometimes-harsh ride and the dated infotainment system. Other engine options available for the 2014 SLK class were the SLK250 which uses a 1.8L Turbocharged inline 4-cylinder and the SLK55 AMG, which uses a 5.5L naturally aspirated V8.

Engine

3.5L V6

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: Check engine light illuminated, rough idling, decreased engine performance, and unusual engine noise.
  • Solution: Replacing the faulty camshaft adjuster solenoid(s).
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil spots under the car, burning oil smell, low oil level. Common leak points include valve cover gaskets and oil filter housing.
  • Solution: Replacing the leaking gaskets or seals.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Transmission

7-Speed Automatic (7G-Tronic)

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or delayed gear changes, particularly between 2nd and 3rd gear, or 5th and 4th. May also exhibit a “clunking” sound.
  • Solution: Transmission fluid flush and filter replacement, or valve body replacement/repair. In some cases, a software update may resolve the issue.
  • Estimated Cost to Fix: $300 - $2000+
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibrations at low speeds, especially when accelerating, or a complete failure.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

Suspension

• Sway Bar Link Failure
  • Description/Symptoms: Clunking or rattling noises from the suspension, particularly when going over bumps or turning.
  • Solution: Replacing the faulty sway bar links.
  • Estimated Cost to Fix: $150 - $400+
  • Recalls: None Found
• Strut Mount Noise
  • Description/Symptoms: Squeaking or creaking noises from the front suspension, especially when turning the steering wheel.
  • Solution: Replacing the strut mounts.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found

Electrical

• Retractable Hardtop Malfunctions
  • Description/Symptoms: The top may fail to open or close completely, get stuck mid-cycle, or display error messages.
  • Solution: Diagnose the system. This may involve checking hydraulic fluid levels, inspecting the sensors and actuators, and potentially replacing faulty components such as the hydraulic pump or latching mechanisms.
  • Estimated Cost to Fix: $200 - $2000+
  • Recalls: None Found
• SAM (Signal Acquisition Module) Issues
  • Description/Symptoms: Problems with various electrical functions, such as lighting, wipers, or central locking.
  • Solution: Replacing or reprogramming the faulty SAM unit.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The car battery drains quickly, especially when the car is not driven for a few days.
  • Solution: Diagnosing and repairing the parasitic drain. This may involve testing individual circuits and components to identify the source of the drain.
  • Estimated Cost to Fix: $100 - $500+ (depending on the cause)
  • Recalls: None Found

Exterior

• Side Mirror Motor Failure
  • Description/Symptoms: The side mirrors fail to adjust electronically, or make unusual noises when adjusting.
  • Solution: Replacing the faulty side mirror motor or the entire mirror assembly.
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found

Interior

• Seat Heater Failure
  • Description/Symptoms: The seat heaters fail to turn on, or only heat intermittently.
  • Solution: Replacing the heating element or the seat heater control module.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2014 Mercedes-Benz SLK350 can present some common issues, ranging from engine and transmission problems to electrical and suspension concerns. Engine issues such as camshaft adjuster solenoid failure and oil leaks can be moderately expensive to repair. Transmission problems, particularly with the 7G-Tronic, are also potential issues, often involving rough shifting and torque converter malfunctions. Electrical issues, especially those related to the retractable hardtop and SAM, can be costly and require specialized diagnostics. While suspension and interior issues are generally less severe, they can still contribute to overall ownership costs. Overall, potential buyers should be aware of these common issues and budget accordingly for potential repairs.