It's very likely your water pump and dripping down to your pan. The other suspects are the heater hoses.
Quote:
Originally Posted by ps2cho
Well first things first is get that green crap out of there right away. Drain, fill with water, drive, drain, fill, keep going until its almost gone and refill with 50/50 Distilled and Zerex G-05, or the latest MB (blue I believe). Both are suitable. Green is NOT and will corrode.
If its life has been with green junk, possibility that engine gallery plugs are corroded if the coolant is coming from the block. I'd bet you'll find rust in the system due to the green coolant used. A system used with correct coolant will essentially never show anything but a smudge of orange tint.
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That's bull ****.
The color of the coolant is determined by whatever dye the manufacturer decided to put in it. The only thing that matters is that it's aluminum safe which every coolant on the market is today. There's nothing special or about the metals, gaskets and plastics found in a Mercedes cooling system. Just flush it out every 2 years.