The Mercedes-Benz CLS63 AMG is a performance icon, blending sleek coupe styling with brutal V8 power. Choosing the right year is crucial to ensuring you get the performance you crave without ending up with a maintenance nightmare. This guide will navigate you through the CLS63's production run, highlighting the best years and identifying potential pitfalls to avoid.
CLS63 AMG Model Year Overview
The CLS63 AMG spanned two generations, each with its own strengths and weaknesses. Understanding these differences is key to making an informed purchase. This guide focuses on the first generation (W219, 2006-2010) and the second generation (W218, 2012-2018).
| Model Year(s) | Key Features/Engine | Potential Issues |
|---|---|---|
| 2006-2010 (W219) | 6.2L Naturally Aspirated V8 (M156) | Head Bolt Issues (Early Years), Air Suspension Problems, SBC Brakes |
| 2012-2018 (W218) | 5.5L Twin-Turbo V8 (M157) | Oil Consumption, Turbocharger Issues, AirMatic Suspension |
| 2014-2018 (W218) S-Model | 5.5L Twin-Turbo V8 (M157), Increased Power, Standard AWD | Increased Complexity, Potential for Higher Running Costs |
Detailed Explanations
2006-2010 (W219) - The Naturally Aspirated Beast
The first-generation CLS63 AMG is powered by the legendary 6.2L naturally aspirated M156 V8 engine. This engine is known for its exhilarating power delivery and iconic exhaust note. However, early models (especially 2006-2008) are notorious for head bolt issues. These bolts can corrode and break, leading to costly engine repairs. Air suspension problems are also common in this generation, often requiring replacement of the air struts. The Sensotronic Brake Control (SBC) system, while innovative, can be expensive to maintain and repair.
Head Bolt Issues: The M156 engine in earlier W219 CLS63 AMGs was prone to head bolt failures. These bolts could corrode and break, potentially causing significant engine damage. If considering a pre-2010 model, check service records for head bolt replacement or factor this repair into your budget.
Air Suspension Problems: The air suspension system on the W219 can be problematic. Common issues include leaks in the air struts and compressor failure. Listen for hissing sounds near the wheels and check if the car sits evenly.
SBC Brakes: The Sensotronic Brake Control (SBC) system was an early form of brake-by-wire. While innovative, it's complex and can be expensive to repair. The SBC pump has a limited lifespan and can fail, requiring replacement.
2012-2018 (W218) - The Turbocharged Era
The second-generation CLS63 AMG transitioned to a 5.5L twin-turbo V8 (M157). This engine offers even more power and torque than the M156, but also introduces new potential issues. Oil consumption can be a problem in some M157 engines, so regular oil level checks are crucial. Turbocharger issues, such as premature failure, can also occur, though less frequently than head bolt issues in the earlier generation. The AirMatic suspension continues to be a potential source of problems.
Oil Consumption: Some M157 engines in the W218 CLS63 AMG can exhibit excessive oil consumption. Regularly check the oil level and look for signs of blue smoke from the exhaust, which can indicate oil burning.
Turbocharger Issues: While less common than head bolt problems in the W219, turbocharger failures can occur in the W218 CLS63 AMG. Listen for unusual noises from the turbos, such as whining or screeching.
AirMatic Suspension: The AirMatic suspension system in the W218, while improved over the W219, can still experience issues with leaks and compressor failures.
2014-2018 (W218) S-Model - The Pinnacle of Performance
The S-Model variant of the W218 CLS63 AMG represents the peak of performance for this generation. It features an even more powerful version of the 5.5L twin-turbo V8 (M157) and comes standard with all-wheel drive (AWD). While offering superior performance, the S-Model also introduces increased complexity, potentially leading to higher running costs. The AWD system adds another layer of maintenance considerations.
Increased Complexity: The S-Model's increased power and standard AWD system introduce more complex components, which can potentially lead to higher maintenance costs.
All-Wheel Drive (AWD) Maintenance: The AWD system in the S-Model requires regular maintenance, including fluid changes and inspections. Neglecting this maintenance can lead to premature wear and expensive repairs.
Frequently Asked Questions
Which CLS63 AMG year is the most reliable? The 2010 W219 and the later W218 models (2016-2018) are generally considered more reliable due to fewer reported issues.
Is the 6.2L or 5.5L engine better? The 6.2L (M156) is known for its raw, naturally aspirated power and iconic sound, while the 5.5L (M157) offers more power and torque through turbocharging. Both have their pros and cons.
Are head bolt issues a guaranteed problem in early W219 models? No, but it's a significant risk. Thorough inspection and service records are essential.
How expensive is it to fix the air suspension? Replacing air struts can cost several thousand dollars per corner. Compressor replacement is also a significant expense.
Is the CLS63 AMG expensive to maintain? Yes, it's a high-performance car with corresponding maintenance costs. Budget accordingly.
Should I buy a CLS63 AMG with high mileage? It depends on the maintenance history. A well-maintained high-mileage example can be a good value, but be prepared for potential repairs.
What should I look for when buying a used CLS63 AMG? Check service records, look for signs of oil leaks or consumption, inspect the air suspension, and have a pre-purchase inspection performed by a qualified mechanic.
Is the S-Model worth the extra cost? If you prioritize maximum performance and all-weather capability, the S-Model is a compelling choice.
What are common modifications for the CLS63 AMG? Popular modifications include ECU tuning, exhaust upgrades, and suspension improvements.
Where can I find reliable information about CLS63 AMG ownership? Online forums and Mercedes-Benz enthusiast communities are valuable resources.
Conclusion
Choosing the best year for a Mercedes-Benz CLS63 AMG depends on your priorities and risk tolerance. While the early W219 models offer the raw appeal of the 6.2L naturally aspirated V8, they also come with potential head bolt issues. The later W218 models provide more power and modern features, but can suffer from oil consumption and turbocharger problems. Thorough research, a pre-purchase inspection, and a realistic budget for maintenance are essential for a satisfying CLS63 AMG ownership experience.