The Mercedes-Benz CLS400, a stylish four-door coupe, offers a compelling blend of luxury, performance, and distinctive design. Choosing the right model year is crucial to ensure a reliable and enjoyable ownership experience. This guide dives into the best and worst years of the CLS400, providing insights into common problems, reliability ratings, and overall value.

CLS400 Model Years: A Quick Overview

The Mercedes-Benz CLS400 was available for a relatively short period within the CLS-Class lineup. Understanding the differences between model years can significantly impact your satisfaction with the vehicle. This guide helps you navigate the nuances of each year to make an informed decision.

CLS400 Model Year Comparison Table

Model Year Key Highlights & Potential Issues Reliability Rating (Out of 5)
2015 First year of CLS400, potential for first-year issues, M276 engine, 7G-TRONIC PLUS transmission, available with 4MATIC all-wheel drive. 3.5
2016 Refinements over 2015 model, improved infotainment system, minor software updates. 4.0
2017 Last year of CLS400, most refined and potentially most reliable, updated interior options. 4.2
2018 (CLS450) While technically a CLS450, it's the direct successor. New M256 engine with EQ Boost, 9G-TRONIC transmission, significantly different technology. 4.5

Detailed Explanations of Model Years and Key Considerations

2015 Mercedes-Benz CLS400

This marks the initial year for the CLS400 model, featuring the M276 3.0-liter twin-turbo V6 engine paired with the 7G-TRONIC PLUS transmission. While offering a blend of performance and luxury, first-year models often have a higher likelihood of experiencing initial production issues. Key areas to inspect include the infotainment system, engine for any leaks, and transmission for smooth shifting. Consider a thorough pre-purchase inspection to identify any potential problems early on.

2016 Mercedes-Benz CLS400

The 2016 CLS400 builds upon the 2015 model, incorporating refinements and addressing some initial issues. The infotainment system received updates, and minor software improvements were implemented. While still using the M276 engine and 7G-TRONIC PLUS transmission, the 2016 model generally exhibits improved reliability compared to its predecessor. Look for evidence of regular maintenance and be aware of potential issues with the air suspension (if equipped).

2017 Mercedes-Benz CLS400

The 2017 model year represents the final year of the CLS400, making it potentially the most refined and reliable of the three. With the benefit of accumulated production experience, the 2017 CLS400 likely has fewer initial issues compared to earlier models. Updated interior options may also be available. Focus on verifying maintenance records and checking for common Mercedes-Benz issues such as oil leaks and electrical glitches.

2018 Mercedes-Benz CLS450 (Successor Model)

While not a CLS400, the 2018 CLS450 is the direct successor and a worthwhile consideration. This model introduces significant changes, including the new M256 inline-six engine with EQ Boost mild-hybrid technology and the 9G-TRONIC transmission. The CLS450 also features a completely redesigned interior and updated technology. This model offers improved performance, fuel efficiency, and a more modern driving experience compared to the CLS400.

M276 Engine

The M276 engine is a 3.0-liter twin-turbocharged V6 engine used in the CLS400. It's known for its smooth power delivery and relatively good fuel economy. However, potential issues include oil leaks, particularly around the valve covers and timing chain covers. Regular oil changes and preventative maintenance are crucial to prolong the engine's lifespan.

7G-TRONIC PLUS Transmission

The 7G-TRONIC PLUS is a seven-speed automatic transmission used in the CLS400. While generally reliable, it can experience issues such as rough shifting or delayed engagement. Regular transmission fluid changes are essential for optimal performance and longevity.

4MATIC All-Wheel Drive

The 4MATIC all-wheel-drive system provides enhanced traction and stability, especially in adverse weather conditions. Ensure the system is functioning correctly by checking for any unusual noises or vibrations during operation. Regular maintenance, including fluid changes, is necessary to maintain the system's performance.

Infotainment System

The CLS400's infotainment system controls navigation, audio, and other vehicle functions. Early versions of the system can be prone to glitches or slow response times. Check for software updates and ensure all features are working correctly.

Air Suspension

Some CLS400 models are equipped with air suspension, which provides a comfortable and adjustable ride. However, air suspension systems can be expensive to repair if they fail. Inspect the system for leaks or sagging, and be prepared for potential maintenance costs.

Potential Problems to Watch Out For

  • Oil Leaks: Mercedes-Benz engines are known for potential oil leaks, especially as they age. Inspect the engine for any signs of leaks, particularly around the valve covers, timing chain covers, and oil pan.
  • Transmission Issues: The 7G-TRONIC PLUS transmission can experience rough shifting or delayed engagement. Ensure the transmission fluid has been changed regularly.
  • Electrical Glitches: Electrical problems can occur in various systems, including the infotainment system, lighting, and sensors.
  • Air Suspension Problems: Air suspension systems can be prone to leaks or failures, leading to a bumpy ride and costly repairs.
  • Infotainment System Issues: The infotainment system can experience glitches, slow response times, or navigation problems.

Maintenance and Reliability Tips

  • Regular Oil Changes: Adhere to the manufacturer's recommended oil change intervals to maintain engine health and prevent oil leaks.
  • Transmission Fluid Changes: Change the transmission fluid regularly to ensure smooth shifting and prevent transmission problems.
  • Inspect for Leaks: Regularly inspect the engine and transmission for any signs of leaks.
  • Check Suspension Components: Inspect the suspension components, including the air suspension (if equipped), for any signs of wear or damage.
  • Maintain Electrical System: Keep the battery in good condition and address any electrical issues promptly.
  • Pre-Purchase Inspection: Before purchasing a used CLS400, have it inspected by a qualified mechanic to identify any potential problems.

Factors to Consider When Choosing a CLS400

  • Budget: Determine your budget and consider the price range for different model years.
  • Mileage: Consider the mileage of the vehicle and its impact on reliability and potential maintenance costs.
  • Maintenance History: Review the vehicle's maintenance history to ensure it has been properly maintained.
  • Condition: Inspect the vehicle's overall condition, including the interior, exterior, and mechanical components.
  • Features: Consider the features you desire, such as 4MATIC all-wheel drive, air suspension, and specific interior options.

Frequently Asked Questions

Which CLS400 model year is the most reliable? The 2017 model year is generally considered the most reliable due to being the final year of production, incorporating refinements and addressing earlier issues.

What are common problems with the CLS400? Common problems include oil leaks, transmission issues, electrical glitches, and air suspension problems (if equipped).

Is the CLS400 expensive to maintain? Mercedes-Benz vehicles generally have higher maintenance costs than other brands. Be prepared for potential repair expenses.

What is the fuel economy of the CLS400? The CLS400 typically achieves around 20 mpg in the city and 30 mpg on the highway.

Should I buy a CLS400 with 4MATIC? If you live in an area with snow or rain, 4MATIC all-wheel drive can provide added traction and stability.

Is the CLS400 a good car for long trips? Yes, the CLS400 offers a comfortable and luxurious ride, making it suitable for long trips.

What is the difference between the CLS400 and CLS450? The CLS450 is the successor to the CLS400, featuring a new engine, transmission, and updated technology.

How long does the CLS400 typically last? With proper maintenance, the CLS400 can last for 150,000 to 200,000 miles or more.

Are parts readily available for the CLS400? Yes, parts for the CLS400 are generally readily available, but they can be more expensive than parts for other brands.

What should I look for in a pre-purchase inspection? A pre-purchase inspection should include a thorough check of the engine, transmission, suspension, brakes, and electrical system.

Conclusion

While all CLS400 model years offer a blend of luxury and performance, the 2017 model year generally stands out as the most reliable option. Consider the 2018 CLS450 for a more modern and technologically advanced experience. Regardless of the model year you choose, a thorough pre-purchase inspection and consistent maintenance are crucial for ensuring a long and enjoyable ownership experience.