Some Mercedes-Benz GLK350 owners report experiencing a thud noise when shifting gears while parked uphill, which may indicate potential transmission damage. This noise could be related to the parking pawl inside the transmission being under stress due to the incline. To prevent rolling, it is advised not to shift into or out of park without firmly applying the parking brake, especially on inclines. Additionally, some owners find that loose or damaged components, such as transmission mounts, contribute to clunking noises during gear shifts or acceleration/deceleration. Issues with the transmission shift cable, shift rod, or shifter linkage actuator may also lead to difficulties in shifting gears. Furthermore, a malfunctioning gear selector is a common concern among Mercedes-Benz vehicles, highlighting the importance of preventative maintenance. If you experience this thud noise, it is recommended to have your vehicle inspected by a professional mechanic to accurately diagnose and address any necessary repairs promptly, as proactive measures can help prevent further damage.
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