Interested ( and am in Canada) but need rear diff ratio. It’s stamped lower front drivers side on the diff housing. Will likely be ( from Dr Benz, Lambton , Ontario) :” The lowest standard gearing in a 113 is 4.08 There is also 3.92, 3.75, and 3.69 3.75 was only available on 230SL's and is a drum brake axle. “