问：我最近有一个96个梅赛德斯，它开始在公园里嘎嘎

Under hood rattling can be caused by loose exhaust components, faulty pulleys and accessories, motor mount faults, loose heat shields, or any loose component. The reason you are noticing the noise only under certain conditions ("park" versus "drive") is because the engine loading, speed and position (if the issue is mount related) changes just enough when you put the car in gear so as to eliminate the noise. From your description, the noise sounds obvious enough that a trained mechanic will very readily pinpoint the origin, and identify the required repairs, if you request an发动机噪声诊断。如果您有其他疑问或疑虑，请随时重新接触万博体育入口as we are always here to help you.