Hello,
Yes Waqas is correct on the wheels. Some W115 versions are 5 1/2" wide and others are 6" wide. Either should work. As far as other parts, not much on this model. Some electrical relays, interior window crank handles, some tool kit tools, rear brake calipers and rotors, original Becker radio, possibly the front two speakers, early versions used the same steering wheel and pad, front and rear side marker lights, full wheel covers, in many cases are the same.