Hello fellas !
So, my PDC beeps in very low volume while backing up my 550i. All speakers work fine.
How can I increase the volume and can I change the distance for sensors to respond ?

Like it shows me green when its close by. If you're reversing at a bit higher speed, its too late for a sensor to respond.

Your suggestions will be appreciated !

 

To adjust the volume, put the car in reverse near a wall/object so that PDC is operating and beeping. While the PDC is beeping, use the volume control knob for the radio to adjust the beeps to the desired volume.

 

works the same for navigation volume and voice command. use volume knob or steering wheel buttons to adjust the volume as the particular sound is on.

 

As far as sensitivity you're talking about, I don't think so. you're right if you're going a specific rate of speed in reverse you may be out of luck. That's why you should always creep the car in reverse and look in the mirror.