Tire Problems of Mercedes Benz CLS500

I bought 4 brand new tire michelin at town fair tire with external warranty 3 years. After 7 months the left front tire was spilt on the side depp but tire is. Not flat yet. I ask the store to exchange because it can cause dangerous accident but they said we can exchange as long as your tire is not totally flat. I don't know which institution of government can impose this business to save the client for what they paying for. I can show photo to my tire as a prove and if this front tire can flat in high way , it will course big accident. It is not fair to pay 1300$ tire with extra warranty and the store tire give a respond like" die first and after get reimbursement". Thank you.

See all problems of the 2006 Mercedes Benz CLS500 🔎.