Took my Jeep Commander 4.7V8 RWD to dealership mech. cause I've been having to refill coolant container every couple of weeks. I've noticed small puddles of coolant after being parked for several hrs. (gen. area is behind passenger side wheel well). This has been going on for several months. Engine is not overheating, and waterpump has been replaced. Mechanic cannot find the leak? Any ideas, tired of buying coolant. Jeep will traded in within 6 mos., so ok to continue refilling? Otherwise help! They're were other services recommeded at the shop, I'll tell you about those later, just currently concerned with this problem.
Other than coolant being a toxic substance that you'd be spreading around, no there isn't a specific reason you couldn't just keep refilling it. There is a risk involved, though. Either you'll forget to refill it (or someone else driving your car forgets), the leak gets suddenly worse, or your reservoir runs dry which introduces air pockets in your cooling system.
Personally, I wouldn't risk it. Find a reputable independent shop near you and at least get a second opinion. It's pretty shocking that they would give up on finding the coolant leak but hand you a list of other things to be done.
In the meantime, make sure that coolant reservoir stays full enough.