I think all the details provided here are correct, i.e. a 107 won't fit, but you could have something fabricated locally as Doug suggests. That being said, let me just add something about actually using a kinder seat.
While accidents with our 113's are uncommon (as the cars are), having an untethered child in that seat, if not illegal in some places, would be unethical. Most injuries and deaths occur from people flying out of the vehicle. I have a 6 year old daughter who loves "The Kiddie Car" but she'd never ride back there--and preschool, the police, and school assemblies on safety have her trained--she won't get into a car without seatbelts. I'd LOVE to have a kinder seat for effect, but I'd never use it with real kinder.
You might actually have some troubles getting anyone to actually fab one or even suggest an installation--too much liability. Jeez, you have the auto companies recalling millions of vehicles for all kinds of safety related issues, things like the wrong grade of steel bolt on a seat bolt anchor etc. How are you going to affix this kinder seat? Will it be safe?
The 113 is a two-passenger vehicle. Get the kinder seat for nostalgia but PLEASE keep your kid properly tethered in the front in a child seat. We can say all we want here, but one thing I think all of us DO NOT want to hear are any condolences.
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored
