have you any idea what these 3 things may cost by experience?? are they only small jobs?
Parking sensors will look similar to those in the Pic
The Heater control control is a fairly easy D.I.Y fix for someone with some mechanical apptitude judging by Members feedback,
Might be just a simple fix for the sensors
I can't say what a garage repair would be as I have no experiance of these repairs.
You could try phoning someone local to get a quote.
Hopefully other Members might offer some advice