Some Mercedes-Benz C300 owners report experiencing transfer case bearing failure, characterized by whining and grinding noises, particularly while the vehicle is in motion. These noises are often traced back to the transfer case output bearing during diagnosis. Additionally, neglecting transfer case issues can lead to oil leaks, which may worsen the situation. Repairing a transfer case bearing failure can be expensive, with average costs around $9,400 for a 2013 model at 62,000 miles, and in some instances, the entire transmission may need replacement due to its internal connection with the transfer case. To mitigate these risks, regular maintenance, including fluid replacement in the transfer case, is essential for preventing major problems and extending its lifespan. Owners experiencing these symptoms are advised to consult a qualified mechanic for accurate diagnosis and prompt resolution to avoid further damage and costly repairs.
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