Over heating small water leak under car on 1991 Mercedes-Benz 300SL

I had a small leak under my car and now the car hover heats and the water bubbled in the resivor, do I have a blown head gasket or a cracked block. I took it to a shop and the man drove it again until it got hot and he forced it to start then parked it, it was like he was trying to do more damage, no water in oil at this point. S & S Equipment McQueeny,Tx drove it and ran it hot after I took it to him on a trailer

Asked by for the 1991 Mercedes-Benz 300SL
sounds like you have a blown head gasket