2009 Mercedes-Benz S63 AMG
The 2009 Mercedes-Benz S63 AMG is a high-performance luxury sedan boasting a hand-built 6.2L naturally aspirated V8 engine, delivering 518 horsepower and 465 lb-ft of torque. This engine was mated to a 7G-Tronic seven-speed automatic transmission. While lauded for its powerful engine, luxurious appointments, and comfortable ride, some owners have reported experiencing specific issues that potential buyers should be aware of. Common likes include the aggressive styling, potent engine, and opulent interior. Dislikes often revolve around maintenance costs, complicated electronics, and potential for expensive repairs. There was also an S550 model available which came equipped with a 5.5L V8 non-AMG engine and a similar 7-Speed transmission.
Engine
6.2L M156 V8
- Camshaft Adjuster (Cam Phaser) Bolts
- Description/Symptoms: The bolts securing the camshaft adjusters can be prone to failure. Symptoms include engine rattling, especially on startup, check engine light, and potentially reduced engine performance. This issue is more prevalent in earlier production M156 engines.
- Solution: Replacing the camshaft adjuster bolts with updated, stronger bolts. In some cases, the camshaft adjusters themselves may need replacement if damaged.
- Estimated Cost to Fix: $2,000 - $6,000+ depending on the extent of damage and if new camshaft adjusters are necessary.
- Recalls: None Found
- Valve Lifter Noise
- Description/Symptoms: Ticking or knocking noise, especially when the engine is cold, potentially caused by worn or sticky hydraulic valve lifters.
- Solution: Replacing the affected valve lifters. In severe cases, camshaft replacement might be necessary.
- Estimated Cost to Fix: $1,500 - $4,000+ depending on the extent of the repair.
- Recalls: None Found
- Intake Manifold Gasket Leaks
- Description/Symptoms: Vacuum leaks resulting in rough idling, poor acceleration, and a check engine light.
- Solution: Replacing the intake manifold gaskets.
- Estimated Cost to Fix: $500 - $1,000
- Recalls: None Found
Transmission
7G-Tronic (722.9)
- Valve Body Issues
- Description/Symptoms: Harsh shifting, delayed engagement, slipping, or failure to shift. Can trigger a check engine light.
- Solution: Replacing or rebuilding the valve body.
- Estimated Cost to Fix: $1,500 - $3,500
- Recalls: None Found
- Torque Converter Failure
- Description/Symptoms: Shuddering during acceleration, unusual noises from the transmission, or complete transmission failure.
- Solution: Replacing the torque converter. In some cases, a transmission rebuild might be necessary.
- Estimated Cost to Fix: $2,000 - $5,000+
- Recalls: None Found
Suspension
- Airmatic Suspension Failure
- Description/Symptoms: The vehicle sits low on one or more corners, the air compressor runs constantly, or the suspension becomes stiff and uncomfortable. Can trigger a warning light on the dashboard.
- Solution: Replacing the affected air struts, air compressor, or valve block. Leaks in the air lines can also occur and need to be addressed.
- Estimated Cost to Fix: $1,000 - $3,000+ per strut, $800 - $1500 for the compressor.
- Recalls: None Found
- ABC (Active Body Control) System Issues
- Description/Symptoms: Similar to Airmatic suspension issues, but with potentially more severe body roll in corners. Can also experience fluid leaks, pump failures, or accumulator issues.
- Solution: Diagnosing and replacing the faulty components, which could include the pump, struts, accumulators, or hydraulic lines. Flushing the ABC system is recommended with any major repair.
- Estimated Cost to Fix: $1,500 - $5,000+ depending on the component needing replacement. ABC pump replacement alone can cost $2000+.
- Recalls: None Found
Electrical
- COMAND System Malfunctions
- Description/Symptoms: The COMAND system (navigation, audio, climate control) can experience glitches, freeze, or fail to boot up entirely.
- Solution: Software updates, or replacement of the COMAND unit.
- Estimated Cost to Fix: $500 - $2,500+
- Recalls: None Found
- Electronic Trunk Latch Failure
- Description/Symptoms: The trunk fails to open or close properly due to a malfunctioning latch mechanism.
- Solution: Replacing the trunk latch assembly.
- Estimated Cost to Fix: $300 - $800
- Recalls: None Found
- SAM (Signal Acquisition Module) Failure
- Description/Symptoms: The SAM controls various electrical functions. Failure can manifest in various ways, including lighting issues, window malfunctions, or other electrical gremlins.
- Solution: Replacing the faulty SAM unit.
- Estimated Cost to Fix: $800 - $2,000+
- Recalls: None Found
- Battery Drain Issues
- Description/Symptoms: The battery drains overnight or within a few days of being parked.
- Solution: Identifying and addressing the source of the parasitic drain, which could be a faulty module, a poorly installed aftermarket accessory, or a failing component.
- Estimated Cost to Fix: $100 - $1,000+ depending on the source of the drain.
- Recalls: None Found
Exterior
- Headlight Condensation
- Description/Symptoms: Moisture buildup inside the headlight housings.
- Solution: Removing the headlight housing and resealing or replacing the housing.
- Estimated Cost to Fix: $200 - $1,000+ depending on severity and if the entire headlight assembly needs to be replaced.
- Recalls: None Found
Interior
- Sunroof Issues
- Description/Symptoms: Sunroof malfunctions, including failure to open or close, unusual noises, or leaks.
- Solution: Repairing or replacing the sunroof mechanism.
- Estimated Cost to Fix: $500 - $2,000+
- Recalls: None Found
Summary
The 2009 Mercedes-Benz S63 AMG offers exhilarating performance and luxurious features, but potential buyers should be aware of the common issues. Engine and suspension problems, particularly with the camshaft adjusters and Airmatic/ABC systems, can be costly to repair. Electrical glitches and transmission issues are also potential concerns. While the severity of these problems can vary, be prepared for potentially high maintenance costs associated with owning this high-performance luxury vehicle.