190sl's had drum brakes all around, and so did the 111 sedans from the very early 60's.
It could be possible that the front subframe from one of these early sedans was installed as a (very bad) repair on the the car, but I can't imagine why.
Insist that the seller let you take a front wheel off. If either there are front drum brakes, or the seller won't allow you to look, run, don't walk away. Good Sl's are not that hard to find.
I'm from Missouri, the Show-Me state.
113-042-10-014715
built 11 Jan 66
904/396 blue, Ivory Tex
condition- rust bucket