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      01-04-2013, 02:21 AM   #27
claykin
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Drives: 2016 535i M-Sport
Join Date: Nov 2009
Location: Florida

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@Spacebug

In your original post you mentioned only about the sensors beeping. Do you recall if the graphic showed an obstruction (the post) but the obstruction just didn't audibly announce itself before it bashed in your bumper?

I've noticed in both this F30 as well as my previous E90 that the graphic tends to give adequate visual warning but on occasion (depending on the type/size/material of the obstruction the distance at which the audible sound begins can vary. If I drive slowly PDC tends to be much more accurate (provided the obstruction is more than 5" tall).

The sensors are ultrasonic so obstruction material type/size/shape etc can all play a role in how the frequencies bounce off the object. For this reason I tend to take the visual cues much more seriously when I cannot see what's behind the car.