Hi from SA

[Dave]

Yes,you're close to Uitenhage & on the lower Southern Eastcoast.I'm not sure if we have any pix of MB C250 installs here on the Forum or not as I havn't looked thru that Section for sometime & can't remember what the front grill area looks like.
If you find a pix of one on the Internet members here will offer suggestions when you're ready.As you're in the Southern Hemisphere it summertime so good weather to get to work unless it's a really hot day there.

Attached a few photos, not sure why they are not the right way around, maybe wrong side of the world, please have a look, two sensors in the front and one in the back, what would be the best positions