I was stopped at intersection waiting for green light.
suddenly, i heard bang sound and my driver's side tire blew off.
I found out that It had crack at inner tire wall. I will post pic tomorrow.

I have 2012 E350 4matic spt pkg @ 35000miles,
Will I be able to get a tire under tire warranty? I don't think I bought additional warranty.

Tire warranty is separate from the manufacturer's warranty. It is also pro-rated per tread wear so if the tire has 40,000 tread life you will get 12.5% of it's value back.

Conti OE tires have a different warranty from aftermarket Conti tires and the OE warranty is more limited (I assume you have Conti tires)

Whatever the brand, call the customer service number for the tire manufacturer and explain the issue. They will direct to a tire dealer who will evaluate the tire and determine if the cause is a manufacturing defect covered under warranty.

Don't hold your breath for any compensation though because at 35k, your tires are nearing the end of their useful life even if you faithfully rotated them.

This may be a good thing through as damage to the inside may be an indicator of a suspension or alignment issue. You should get the remaining tires checked as well.