Is anybody else finding the warning tone of the rear parking sensors to be too quiet and the warning tone for the front sensors too loud in comparison? I noticed this somewhat in Europe, but more so now that the car is here in the USA. It was a hot day yesterday and the A/C was going at it. I could barley here the rear sensors over the fan noise, while the fronts were kinda blasting in comparison. I have the volume set to 5 (max) at the moment. In my RS5 I was able to set the volume and pitch independently for the front and rear sensors, but looks like the C63 (2019) only has a single volume and pitch setting that applies to both with the rear being quieter and at lower pitch than the front. I've gotta say there are several things about the parking assist that I find very poorly done/designed in this car. I have a hard time knowing how close I am to things. In my Audi I actually had a sensor view that showed lines moving closer to the car as I was approaching things, but here the various areas around the car just go from green to orange to red and I don't really know how close is orange and red. The saving grace is the 360 camera somewhat, but since one can't zoom in and especially at night or when it rains the image is not as helpful as I wished. I let the car parallel park itself for the second time yesterday. I only tried it once in Europe in a fairly large parking space, but this time it was a typical tight parking space around here. It parked itself perfectly, but it was a bit scary I have to say as I felt it was about to hit something and I overrode it with the brakes multiple times to slow down the maneuver. There was a fairly tall curb. I think I have to do it a few more times before I trust the system, but I might end up using it more than I initially thought. Letting it exit the parking spot automatically afterwards was pretty cool, though. This might come in handy when getting boxed in by other cars.

 

I haven't paid close attention to this to have noticed (if this is the case). I have found both the front and the rear sensors to be similar volume/pitch when they go off.

I agree with you that it is not easy to figure out which edge/part of your car is close to an object, and how close. I had to park on a steep downhill slope and I took the careful effort to keep good distance from the right hand side curb. The top view was useful but required extra careful attention. I parked extra close to the curb that I needed to because of not being able to judge accurately using the top view. I had however turned the wheels towards the curb since it was on the slope.

When I came back, there was no car in front of mine when taking my car out. I forgot about the turned steering wheel, let go off the brake (without turning the steering wheel) and I curb-rashed my front right wheel. This was still my fault technically, and learnt a good lesson to always leave extra space from the curb while parking, even if I need to spend a few extra minutes re-parking.