Hi I have the 2.7t it takes the pnk coolant g13 i believe i cannot get any now.. the car is running on water it should freeze tonight will it harm my car any if i put green coolant in there? the peak 50/50

 

Audi doesn't advise using anything but G12 or G13. I suppose you could put green in there and flush the system several times in hopes of getting all of that crap out. I certainly wouldn't leave it in there for a long period of time. Oh, and make sure the system has been purged of all G12 or G13 coolant prior to adding green stuff.

Or an alternative would be to drain the system tonight and let it sit empty and then refill tomorrow prior to use and then drive to get the proper coolant.

 

Do not mix the green coolant with the G12/G13. From what I've read they react negatively when mixed and turns into a chocolate milkshake like substance.

That's a good suggestion by Nebuchadnezzar. Drain it. Refill in the morning.

Where is the coolant leaking out?

 

Also, do yourself a favor and mix it with distilled water as tap water or spring water will contain minerals that may allow the system to rust / deteriorate over time.