DISCLAIMER; I am not providing any details of where the medals are to be found, as I do not have a comprehensive map of them all yet.
This is merely a tip for those that may be struggling collecting them. You can't just drive through the medals to pick them up, you have to open up the "Construction View" mode by pressing
whilst your vehicle is at a standstill. This will give you a skeletal/thermal view of your vehicle and surrounding areas.
In this view the medals will appear red, and can be seen through walls, as well as from a good distance away - which helps when searching for them.
Once in this view, and in a fairly close (but not immediate) vicinity of the medal, you must highlight it by using the
button. Once highlighted, press
and then move
to 12 o'clock and press
again to collect the medal.
I hope this tip helps those struggling to retrieve the medals. Happy Hunting.