have C180 97, auto. yesterday got stuck in traffic, heard kinda blow, grey smoke.when i opened hood i found oil was blown all over engine (smoke). i found out that i had no water in radiator,but icouldnt find oil leak. later i find hole in radiator (between expansion tank and radiator). could it be burstedtransmission pipe inside radiator?? engine works pefect, only radiator warning light is on. had recently changedtransmission fluid.i think theyput too much fluid. any suggestions??

 

Change the radiator, add coolant. Move on from there.