Mercedes flush medium is only citric acid. That should not adversely effect any of the related components. Other aftermarket solvents are likely to be way too corrosive, which would account for eating the heater core on your Taurus.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.