The Mercedes-Benz CLC, known internally as the CL203, served as a sporty coupe option in the Mercedes lineup between 2008 and 2010. Based on the W203 C-Class platform (produced from 2000-2007), the Mercedes CLC was introduced as a stop-gap model before the release of the C204 C-Class Coupe facelift in 2011. For those considering a used Mercedes CLC, it’s generally regarded as a solid vehicle, inheriting the robust build quality of the W203 series. However, like any used car, particularly one with a performance-oriented engine like some Mercedes CLC models, there are specific areas potential buyers should carefully inspect.
One of the primary concerns for prospective Mercedes CLC owners revolves around the 1.8-liter M271 Kompressor engine, particularly the 143bhp variant. This engine, while offering a good balance of performance and efficiency, is known to be susceptible to premature timing gear failure. Therefore, when evaluating a Mercedes-Benz CLC with this engine, prioritizing a low mileage example with a Full Service History (FSH) is crucial. Pay close attention to any unusual rattling noises, especially during startup and idle, as these could indicate timing chain issues. Some proactive owners have chosen to replace camshaft sprocket wheels preemptively, which is a significant advantage if documented in the service history of the car you are considering.
Beyond timing gear, the M271 Kompressor engine in the Mercedes CLC can experience other common, though less severe, issues. These include split vacuum hoses located beneath the air cleaner box, which can lead to a rough idle. A blocked crankcase breather can trigger the Engine Management Light (EML) on the dashboard. Additionally, a failing thermostat might prevent the engine from reaching its optimal operating temperature (80+ degrees Celsius) quickly. Fortunately, these issues are generally not prohibitively expensive to rectify, but they are worth noting during a pre-purchase inspection.
Another point of inspection specific to the M271 engine in a Mercedes CLC is potential oil leaks from the camshaft position sensors situated at the front of the engine. A simple check involves disconnecting the electrical plug to these sensors and inspecting for any oil presence. The detection of oil within the plug is a serious concern, as oil ingress can migrate along the wiring harness and potentially damage the Engine Control Unit (ECU), necessitating a costly replacement.
Moving beyond engine-specific issues, there are common faults related to the Mercedes CLC itself as a vehicle. 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. Similarly, a failed steering wheel angle sensor can trigger the ESP (Electronic Stability Program) fault light. Repairs for both of these sensor issues can be more expensive compared to the engine-related fixes mentioned earlier.
The suspension system of the Mercedes-Benz CLC is generally robust. However, wear and tear items such as rear dampers and various rubber boots and bushes are subject to degradation over time and mileage. Broken springs are also a relatively common occurrence in used vehicles, including the CLC. During a test drive, carefully listen for any unusual thuds or knocking sounds, especially when driving over speed bumps or uneven road surfaces, as these could indicate suspension issues requiring attention.
Regarding in-car entertainment, the Mercedes CLC was offered with two primary infotainment system options: the basic Audio 20 (radio and CD player) and the more advanced COMAND NTG2.5 (radio, CD player, and Satellite Navigation). The COMAND system is generally considered the superior option, offering enhanced sound quality, additional audio functionalities, and integrated Bluetooth for hands-free calling. Visually, COMAND is also more appealing due to its dedicated Sat Nav screen. However, it’s worth noting that the integrated satellite navigation system in the COMAND NTG2.5 is now quite outdated by modern standards. For owners seeking contemporary features like Apple CarPlay or Android Auto, aftermarket Chinese Android-based head units are a popular and relatively inexpensive upgrade. While these units can offer extensive functionality, some purists feel they detract from the original interior aesthetic of the Mercedes CLC.
In conclusion, a used Mercedes-Benz CLC can be a rewarding purchase, offering a blend of Mercedes-Benz quality and sporty coupe styling. However, being aware of the common problems, particularly those associated with the M271 Kompressor engine and certain electronic components, is essential. Thorough pre-purchase inspections, focusing on the points outlined above, will significantly increase your chances of finding a well-maintained Mercedes CLC and avoiding potential headaches down the road. Good luck with your search for your ideal Mercedes CLC.
