DEF system along with inept engineering results in the heater core becoming plugged. Has been Band-Aid repaired 4 times by VW. Renders use of car unsafe to drive in winter as cannot keep windows clear of frost. At -30 operator needs to wear full winter parks and gloves. Each time Band-Aided cost to VW 4000.00 to 6000.00. Now off warrantee, too expensive to fix every year. 60,000.00 car that can only be used 4 months a year. VW Canada will do nothing but suggest I buy another one of their products. VW, Horrible Quality, Known Problem, NEVER AGAIN.