Was the service done on St. Patrick's Day?

I think that reputable shop isn't so reputable.... or they hired someone new. The green stuff can't be the proper coolant. Or they probably saw green coolant and figured they could save a few bucks because the owner didn't know any better.

The green coolant won't kill your engine, but it's not good for the long haul. It'll deteriorate the rubber hoses and may cause premature failure of the water pump. Not worth it to save a few dollars.

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95 E320 Cabriolet, 169K