No heat for months. Heater core flushed with little improvement. Recommended (by our own mechanic)we replace heater core. VW Dealer also says we need new radiator and my wife settles for $87 radiator flush instead with the core replacement. Shouldn't radiator flush come standard with heater core replacement? Did VW just tack on another charge? (We used a $250 coupon they offered - 3% times the age of the car). I just think they're recovering that money.