2016 Mercedes-Benz SLK350

The 2016 Mercedes-Benz SLK350 is a stylish and sporty roadster equipped with a 3.5-liter V6 engine producing 302 horsepower and 273 lb-ft of torque. Other engine options available for the SLK class in 2016 include a smaller displacement engine in the SLK250 and a more powerful V8 in the SLK55 AMG. It is only offered with a 7-speed automatic transmission. Owners generally appreciate the SLK350’s nimble handling, attractive design, and retractable hardtop. Common dislikes include the relatively small interior space and some reported issues with electronic components.

Engine

3.5L V6

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: Engine may experience rough idling, decreased performance, and the check engine light may illuminate. Diagnostic codes related to camshaft position may be stored.
  • Solution: Replacement of the faulty camshaft adjuster solenoid.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found
• Oil Leaks (Valve Cover Gaskets/Oil Filter Housing)
  • Description/Symptoms: Visible oil leaks on the engine, burning oil smell, and low oil level.
  • Solution: Replacement of the valve cover gaskets or oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Transmission

7G-Tronic 7-Speed Automatic (722.9)

• Torque Converter Issues
  • Description/Symptoms: Shuddering during gear shifts, particularly at low speeds or under light acceleration. Transmission may slip.
  • Solution: Replacement of the torque converter. Software updates to the transmission control module may help in some cases.
  • Estimated Cost to Fix: $1,500 - $3,500+
  • Recalls: None Found
• Valve Body Problems
  • Description/Symptoms: Harsh or erratic shifting, delayed engagement, or failure to shift gears. Diagnostic codes related to valve body malfunctions may be stored.
  • Solution: Replacement or rebuilding of the valve body.
  • Estimated Cost to Fix: $800 - $2,000+
  • Recalls: None Found

Suspension

• No Issues Found

Electrical

• Retractable Hardtop Malfunctions
  • Description/Symptoms: The retractable hardtop may fail to open or close properly, or may stop mid-cycle. Error messages related to the roof mechanism may be displayed.
  • Solution: Diagnosis of the roof mechanism, including the hydraulic pump, sensors, and wiring. Repair or replacement of faulty components.
  • Estimated Cost to Fix: $500 - $2,500+
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The battery may drain quickly, especially if the vehicle is not driven frequently. This can lead to difficulty starting the car.
  • Solution: Identify parasitic drain by testing each circuit. Replace faulty module or device.
  • Estimated Cost to Fix: $100 - $1,000+
  • Recalls: None Found

Exterior

• Convertible Top Seal Leaks
  • Description/Symptoms: Water leaks into the cabin, especially during heavy rain or car washes.
  • Solution: Inspection and replacement of the convertible top seals. Adjustment of the top mechanism may also be necessary.
  • Estimated Cost to Fix: $200 - $1,000+
  • Recalls: None Found

Interior

• Sun Visor Issues
  • Description/Symptoms: Sun visors may become loose or detached from the mounting point.
  • Solution: Replacement of the sun visor or repair of the mounting mechanism.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Summary

The 2016 Mercedes-Benz SLK350, while a desirable roadster, can present owners with some notable issues. Engine oil leaks and camshaft adjuster issues can lead to performance problems and require moderate investment. Transmission problems with the 7G-Tronic, particularly concerning the torque converter and valve body, can be costly to address. Additionally, electrical issues with the retractable hardtop and battery drain are common areas of concern. Careful inspection of these areas is recommended prior to purchase. The issues range in severity from minor inconveniences to potentially expensive repairs, so a thorough pre-purchase inspection is crucial.