Date registered: Dec 2008
Vehicle: w204 (C350ELE)
Location: Miami, Fl and Mar del Plata, Argentina
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
The pulley/tensors you see on the video, and the rest on the same belt, are driven by the crankshaft. As such they are subject to the rpm's developed by the engine, which is independent of the vehicle speed because, obviously, it depends upon the shift engaged.
Regarding the video and your question, I'd pay close attention to the axis of the pump which is wavering in and out visibly, as it is for the belt. You seem to have something grinding and wearing out in there.
A car would show appreciation for preventive maintenance by never leaving his owner stranded.
Defensive Driving is never having to say you're sorry: a true love story between man and machine.