Installing the Bosch HDI7152 slide in with a bull...

The pic of the bull nose detail didn't come through, but I have some suggestions anyway. First of all, The way Bosch finished the control panel ends is strange. No matter what you do, the fix may not completely satisfy.
1. You can cut off the awkward triangle flange and file the edges smooth. Do this only if it won't expose any openings or weird detail. 2. If the triangle flange prevents you from pushing the range into position against the wall, you could cut away the bull-nosing just in the areas where the triangle flange is, and smooth any sharp corners. 3. If the range is all ready to the back wall and the control panel sticks out from the bull nosing, you could fabricate  filler pieces the had the contours of the bull nose on one end and the contour of the triangle flange on the other. This piece would be applied to the sides of the range. 4. If you take a look at your instruction manual, you will see that it covers both the stand alone model and the slide-in. You may like the flat control panel on the front of the stand-alone version. If you do, and the bull nose issue is really getting to you, you may want to have the stand alone front panel fitted to your range, if possible.
No matter what you do, there is no easy fix.