Mercedes-Benz C240 transmission cooler leaking antifreeze from radiator causing slipping issues on Mercedes-Benz C240

Some Mercedes-Benz C240 owners report experiencing transmission issues due to leaking antifreeze from the radiator, which can lead to slipping problems in the transmission. The most common cause of coolant entering the transmission is a failure of the transmission cooler inside the radiator, often resulting from a leak in the cooler or a clogged line. Symptoms of a failing transmission cooler reported by owners include leaking fluid, contaminated fluid, overheating transmissions, dashboard warning lights, trouble shifting, and unusual noises. Additionally, if a cooler line leak occurs at the radiator, it can significantly affect the vehicle's performance. To effectively address these issues, it is crucial for owners to diagnose the specific cause of the leak and undertake appropriate repairs, alongside regular maintenance and inspections of the radiator to prevent future problems.