Velox

I got a low coolant warning. The coolant was totaly empty. I refilled and when I start the car the coolant drains immediately. I see no leaks.
Any suggestions, what can make the coolant drain so fast? hope its not the head/gasket. (s4 b6)

Grisho

The only places the coolant can go:
1. leak on the ground - you should see it easily
2. leak inside the cylinder - the engine will not run at all or run poorly
3. leak inside the oil pan - checking the oil level will tell you this
4. Another option is that your system was completely empty so it does not leak anywhere it just needs to be filled up (I assume this is not the case).

Can you check these options and which one is it?

TEB

I'd bet it is #4. Unless you know this isn't true, I'd start by continuing to fill.