I took my SL500 1995 out for a spin after placing a block/heater core sealant into the heater core last week. It is still leaking a small puddle of green, kinda thick slime after the car sits or is driven. When I did the heater core, I replaced the thermostat because it was giving me trouble and the antifreeze. The car had Prestone (which is green) in it and I flushed everything out and installed the Zerex brand (which is kinda light yellow) Since the green slime is still dripping out, I am concluding that this is freon/dye residue. The car still cools well. The dealer says that the hose that this stuff drips from (located in the trans/drive shaft tunnel) is coming from the heater core/evaporator compartment and if it isn't antifreeze, it has to be the freon/dye leaking out. Anyone have any thoughts? Agree or disagree? To remove the dash and replace the evaporator is about a $4K job at the dealer. The price on the MB dealer evaporator is $800 alone. So I would be inclined to use a sealer if that might work. I welcome ideas at this point. How about the MB service techs weighing in on this?