vettemad

Hi Guys, I got a bent (tweeked) crank shaft from an accident this car was in before I got it, since the car only has 55k miles I am considering trying to straighten it, When straightening something like this it's crucial to know what the material you're working with is...I need to know if this crank in my c280 is steel or cast iron...simple info if it's a chevy, but hard to find anything on a benz...do you know? thanks!