coalant backing reservior on 2001 Porsche Boxster

it happened when i was driving for a while and i park the car to do some business transacton when i came back all the coalant was in the ground and it is leaking right under the car, troubleshoot. filled with water, crack vehicle when warm notice that water backing to reservior. give me a tip why water is backing up.

Sounds like your engine is over heating and pushing the coolant out to the reserve bottle and beyond. It could be a defective cooling fan, a stuck thermostat or other things. Have a good German Car shop check this out before you really damage your engine from an over heat.