Hi, any other Mk3 Leon owners (2.0tdi FR) have coolant issues. My coolant has turned black and contaminated and was only spotted as my heating stopped. Told I need a new heater matrix and a coolant flush. Car is sadly outside warranty. Has a full seat service history and car was last serviced only 2 months ago. Has anyone else had this issue, what sort of costs to fix, any other long term issues. Did you need a second flush? Any other damage done by the contaminated coolant in the system for so long? Cheers.