2009 Mercedes-Benz SLK200

The 2009 Mercedes-Benz SLK200 is a stylish and sporty roadster, part of the R171 generation. The SLK200 features a 1.8-liter supercharged inline-4 engine producing around 184 horsepower and 184 lb-ft of torque. Other engine options available for the SLK in other markets include a V6. The SLK200 is generally praised for its retractable hardtop, nimble handling, and Mercedes-Benz build quality. However, some common complaints include electrical issues, particularly with the roof mechanism, and some engine-related concerns. This generation SLK came with either a 6-speed manual or a 5-speed automatic transmission.

Engine

1.8L Supercharged Inline-4

• Failed Mass Air Flow (MAF) Sensor
  • Description/Symptoms: Engine hesitates or stalls, poor fuel economy, check engine light illuminated.
  • Solution: Replace the MAF sensor.
  • Estimated Cost to Fix: $150 - $300+
  • Recalls: None Found
• Camshaft Adjuster Solenoid Issues
  • Description/Symptoms: Rough idling, poor performance, check engine light.
  • Solution: Replace the faulty camshaft adjuster solenoid.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found
• Supercharger Issues
  • Description/Symptoms: Whining noises, reduced power, potential belt slippage.
  • Solution: Inspect and replace supercharger components or the entire unit if necessary.
  • Estimated Cost to Fix: $500 - $2,000+
  • Recalls: None Found

Transmission

5-Speed Automatic Transmission

• Torque Converter Failure
  • Description/Symptoms: Shuddering during gear shifts, particularly at lower speeds, or complete loss of drive.
  • Solution: Replace or rebuild the torque converter.
  • Estimated Cost to Fix: $800 - $2,500+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Erratic shifting, harsh gear changes, slipping between gears.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $700 - $1,800+
  • Recalls: None Found

6-Speed Manual Transmission

• Clutch Failure
  • Description/Symptoms: Slipping clutch, difficulty shifting, unusual noises when pressing the clutch pedal.
  • Solution: Replace the clutch disc, pressure plate, and throw-out bearing.
  • Estimated Cost to Fix: $600 - $1500
  • Recalls: None Found

Suspension

• Worn Suspension Bushings
  • Description/Symptoms: Clunking noises from the suspension, imprecise handling, uneven tire wear.
  • Solution: Replace worn suspension bushings (control arm bushings, sway bar bushings, etc.).
  • Estimated Cost to Fix: $200 - $800+ (depending on which bushings need replacing)
  • Recalls: None Found
• Failed Struts/Shocks
  • Description/Symptoms: Bouncy ride, poor handling, excessive body roll.
  • Solution: Replace the struts/shocks.
  • Estimated Cost to Fix: $400 - $1,200+ (depending on the brand and whether replacing in pairs)
  • Recalls: None Found

Electrical

• Retractable Hardtop Malfunctions
  • Description/Symptoms: Roof fails to open or close, gets stuck mid-operation, error messages on the instrument cluster.
  • Solution: Diagnose and repair the roof mechanism. This could involve replacing hydraulic pumps, sensors, or wiring.
  • Estimated Cost to Fix: $300 - $2,000+ (depending on the complexity of the issue)
  • Recalls: None Found
• Faulty Window Regulators
  • Description/Symptoms: Window not going up or down, making strange noises, or moving erratically.
  • Solution: Replace the window regulator.
  • Estimated Cost to Fix: $250 - $500+
  • Recalls: None Found
• EIS/ESL (Electronic Ignition Switch/Electronic Steering Lock) Failure
  • Description/Symptoms: Key not recognized, car won’t start, steering wheel locked.
  • Solution: Replace or repair the EIS/ESL module.
  • Estimated Cost to Fix: $800 - $2,000+
  • Recalls: None Found

Exterior

• Convertible Top Seal Leaks
  • Description/Symptoms: Water leaks into the cabin during rain or car washes.
  • Solution: Replace or reseal the convertible top seals.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Interior

• Seat Heater Failure
  • Description/Symptoms: Seat heater does not turn on or only heats intermittently.
  • Solution: Replace the seat heater element or control module.
  • Estimated Cost to Fix: $200 - $600
  • Recalls: None Found
• Center Console Buttons Wear
  • Description/Symptoms: The symbols on the buttons for the radio, HVAC, and other functions fade or wear off, making them difficult to read.
  • Solution: Replace the center console button assembly or use aftermarket decals to restore the symbols.
  • Estimated Cost to Fix: $50 - $400
  • Recalls: None Found

Summary The 2009 Mercedes-Benz SLK200, while generally a reliable and enjoyable roadster, does have some common issues that owners should be aware of. Electrical problems, especially related to the retractable hardtop, tend to be the most frequent and potentially costly. Engine and transmission issues are also possible, with the supercharger, torque converter and valve body being the most concerning. Suspension issues are generally less severe but can impact ride quality and handling. While some issues are relatively minor, others can be expensive to repair, so a thorough pre-purchase inspection is recommended.