Mercedes-Benz Markham

I picked up my *** within a year. My tire has since cracked on the sidewall ($600 repair), and a rim has cracked on a separate,unrelated instance (tire undamaged) on a different side. I've driving many performance cars in past including ***, ***, ***. None of which has ever had this problem. When I contacted my dealership, they expressed just that day alone, they've dealt with 2 cracked rims and countless more the previous month. I tried contacting the manager *** but he won't return my call. They want $1400 for an issue I believe to be manufacturer defect. These rims should not crack this easily. It's a safety issue. I refuse to give more money to a company that doesn't stand behind their products. I'll gladly give the car back and never lease another car with them ever again.