Very rare: Pirin-FIAT 124
Built in Bulgaria for 5 years, with less than 900 total built:
They also built FIAT 850 sedan and coupe
For example, the T4 has a floor that is fairly distinctive in that the fuel tank is under the front seats and the floor in the cab is therefore raised a few inches relative to the rear cabin and the fuel filler is behind the driver's door. In the V-class/Vito the fuel filler is much farther back (and I bet the fuel tank is farther back as well). If they have significantly different floors, I think it's safe to say they're not related.
It is true that the V was available with VW's 2.8 VR6 too but it wasn't even the same one (in terms of the state of tune) as in the T4. The V got the 172hp version, the T4 got the 140hp version.
The Morris Mini was made under several different names.
Morris Mini-Minor (the original name)
Morris Mascot (Denmark Only)
Austin Partner (Denmark only)
Innocenti Mini (Lisenced production in Italy)
The Italian version, the Innocenti Mini was even rebodied for 1975, still keeping the original chassis of the Morris Mini. It received Daihatsu engines in the early 80s. A DeTomaso performance version of the Innocenti was even sold in Canada in the mid 80s.
1972 Innocenti Mini Cooper 1300
The Eagle Vision (Eagle not being a brand recognized outside of North America) also was sold as the Chrysler Vision overseas, most likely as it was more "Euro" already than any of its NA siblings with its EU-friendly amber rear signals.
I am pretty sure that some Euro markets got the Vision branded as an Eagle, I'm not totally sure though.
Some Chryslers were rebranded as Talbots, like the Omni.
T4 VW (front cabin step is very visible in the 2nd pic):
Totally different floor structure (VW's is raised for the front seats). Don't see how something like that would be different if the Benz used a VW T4 body.