The Mercedes Benz Clc, internally designated as CL203, served as a stylish coupe option in the Mercedes lineup between 2008 and 2010. Positioned as a stop-gap model before the C204 facelift arrived in 2011, the CLC is based on the robust W203 platform (produced from 2000-2007). While generally considered a solid vehicle – with many owners appreciating the W203’s inherent reliability – prospective buyers and current owners should be aware of some common issues, particularly concerning the 1.8L M271 Kompressor engine.
Engine Concerns: M271 Kompressor and Potential Pitfalls
The 1.8-liter M271 Kompressor engine, producing 143bhp in the CLC, is known to occasionally suffer from premature timing gear failure. This is a critical point to investigate when considering a Mercedes Benz CLC. Ideally, prioritize models with a lower mileage and a Full Service History (FSH). Upon inspection, carefully listen for any unusual rattling noises, especially during engine startup and idle. Some proactive owners have chosen to replace the camshaft sprocket wheels preventively, which is certainly a beneficial sign indicating diligent maintenance.
Beyond timing gear, several other common issues can arise with the M271 engine. A split vacuum hose located beneath the air cleaner box can lead to a rough idle. A blocked crankcase breather is another potential problem that may trigger the Engine Management Light (EML). Furthermore, a failing thermostat can prevent the engine from reaching its optimal operating temperature (around 80+ degrees Celsius) in a timely manner. Fortunately, these issues are generally not excessively expensive to rectify, making preventative maintenance and early detection key.
Oil Leaks and ECU Vulnerability: Camshaft Position Sensors
Another crucial area to inspect is the potential for oil leaks from the two camshaft position sensors situated at the front of the engine. A simple yet effective check involves disconnecting the electrical plug of these sensors and examining them for any signs of oil. The presence of oil within the plug is a warning sign. If oil is detected, it could unfortunately indicate a more serious problem: oil ingress into the wiring harness, potentially traveling up to the Engine Control Unit (ECU). In such cases, ECU damage may necessitate replacement, adding a significant cost to repairs.
Common Vehicle Faults: Beyond the Engine Bay
Moving beyond engine-specific issues, there are some common faults associated with the Mercedes Benz CLC itself. A frequently reported problem is the failure of the front passenger seat occupancy sensor mat. This malfunction typically results in the SRS (Supplemental Restraint System) fault light illuminating on the dashboard. Another common electrical issue involves the steering wheel angle sensor, which, when faulty, can trigger the ESP (Electronic Stability Program) fault light. Repairing these sensor-related issues can be more expensive compared to some of the engine maintenance items.
Suspension and Ride Comfort: Points to Evaluate
The suspension system of the CLC is generally robust. However, like any vehicle component, wear and tear is inevitable. The rear dampers are known to be susceptible to wear over time. Additionally, all the rubber boots and bushes within the suspension system should be inspected for degradation. Broken springs are also a relatively common occurrence. During a test drive, pay close attention for any unusual thuds or knocking sounds, particularly when driving over speed bumps or uneven road surfaces. These noises can be indicative of suspension issues requiring attention.
Infotainment Choices: Audio 20 vs. COMAND NTG2.5
The Mercedes Benz CLC offered two primary infotainment system options: the standard Audio 20 and the more advanced COMAND NTG2.5. The basic Audio 20 system provides radio and CD functionality. In contrast, the COMAND NTG2.5 system is a superior unit, offering enhanced sound quality, integrated satellite navigation (SatNav), and built-in Bluetooth for hands-free phone calls. Visually, COMAND is more appealing due to its larger SatNav screen. However, it’s important to acknowledge that the built-in SatNav system in COMAND NTG2.5 is now considerably outdated by modern standards.
For owners seeking contemporary infotainment features like Apple CarPlay and Android Auto, replacing either the Audio 20 or COMAND system with an aftermarket Chinese Android unit is a popular and cost-effective upgrade. While these units can offer a wealth of modern functionality, they do alter the original aesthetic of the car’s interior.
By being aware of these potential issues, prospective buyers can approach the Mercedes Benz CLC market with informed caution and conduct thorough inspections. Focusing on lower mileage examples with comprehensive service histories will significantly increase the chances of finding a reliable and enjoyable CLC.
