One problem related to tire bubble has been reported for the 1997 Mercedes Benz C230. The most recently reported issues are listed below.
Conti pro contact tires put on rims and balanced for summer driving. 195/65 r15 91h dot#65pcaxh61610 2 miles away from garage tire suddenly deflated. Inspection showed bubble caused by manufacturing defect. In google- substantial complaints about these tires I. E. Bubbles, blow outs etc. -dangerous! -.