2020 Mercedes-Benz CLA Reliability Report

Owners report several engine-related issues with the 2020 Mercedes-Benz CLA, with complaints frequently mentioning engine stalling and shutdowns while driving, often without prior warning lights. A notable pattern includes failures of the cylinder head and oil pump, with symptoms like check engine lights and sudden power loss, typically occurring around 27,000 to 60,000 miles. Additionally, one incident describes a fire originating in the engine compartment after recent servicing, highlighting a potential safety risk. These issues can lead to hazardous situations such as sudden loss of propulsion or being forced into "limp mode," which can pose a danger in traffic.

Owners of the 2020 Mercedes-Benz CLA report issues with the rearview camera system, particularly when reversing. Common symptoms include the camera image freezing or failing to display, and in some cases, the camera going black after a brief display. These problems are noted at various mileages, with some reports mentioning issues as early as 3,000 miles. There are safety implications, as two complaints involve crashes attributed to the camera or sensor system failures while reversing. Buyers should be aware that some owners have experienced recurring issues even after software updates intended to address these problems.

Owners of the 2020 Mercedes-Benz CLA report several issues related to steering, with the most common being noises such as popping or clicking when turning the wheel, particularly when the vehicle is cold. Some owners also describe a grinding sound at lower speeds and instances where the steering wheel resists movement or feels delayed. One complaint involves a crash with two injuries, attributed to the steering locking unexpectedly. Complaints do not consistently specify mileage, but one owner notes tire wear issues between 5,000 to 9,000 miles. Safety implications include potential loss of control, as evidenced by the crash report.

Owners of the 2020 Mercedes-Benz CLA report issues primarily related to the vehicle's structure, with multiple complaints about roof panel detachment and defective door hinges. Roof panels, particularly those near the sunroof and windshield, are described as detaching while driving, posing potential road hazards, with some reports linking this to heat stress or design flaws. Complaints about door hinges highlight problems with detents not holding doors ajar, causing them to close unexpectedly and sometimes result in injury. These issues are noted at varying mileages, with one report specifically mentioning approximately 28,722 miles. Safety implications include the risk of injury from door malfunctions and potential road hazards from detached roof components.

Owners of the 2020 Mercedes-Benz CLA report issues primarily related to the sunroof, with multiple complaints describing the sunroof shattering or exploding while driving at highway speeds, typically between 34,000 and 48,000 miles. Symptoms include loud abnormal sounds followed by glass shards entering the vehicle, which in one case resulted in minor injuries to the occupants. Complaints frequently mention the need for sunroof replacement, although repairs are not always completed. These incidents highlight potential safety implications due to the risk of injury from shattered glass while driving.

Owners of the 2020 Mercedes-Benz CLA report issues with the airbag system, including malfunctioning airbags and incomplete recall repairs. One complaint describes an airbag system defect discovered shortly after purchase, with the dealership refusing to repair it without charge. Another owner reports a loud explosion near the driver's side windshield pillar without airbag deployment, resulting in tinnitus. A recall is mentioned in one complaint, with airbags not yet replaced. There is also a report of a crash involving Takata airbags, resulting in injury. These issues highlight potential safety implications, including non-deployment and possible injury, that prospective buyers should be aware of.

Owners of the 2020 Mercedes-Benz CLA report issues with the vehicle speed control system. One common problem involves the traffic sign reader feature, which can cause the vehicle to abruptly slow down without warning when it detects a speed limit sign, as described by an owner at approximately 12,000 miles. Another owner notes intermittent unintended acceleration, with speed increases of up to 35 mph, occurring multiple times since the vehicle's purchase in February 2020. These issues have not been linked to crashes or injuries, but owners express concern over potential safety risks. Buyers should be aware of these reported problems, particularly the possibility of unexpected speed changes.