Hi, I have a w212 e200 cgi car. My vehicle makes noise at regular intervals when idling. When I use a stopwatch, the intervals make this sound for 2:13 minutes and not for 1:01 minutes. The sound stops when the gear is in N position and reaches 2000 rpm. Still no sound when driving in D position. I am attaching the video of the sound coming from the vehicle. I would be happy if friends who have experience on this subject share their comments.