Sir,
Mehran mai abhe bhe leaf springs hain and they have not converted into coil springs. instead they have reduced one phatta from the kamani so we have two instead of three phattas.
In India maruti suzuki introduced 5 speed efi model with 4 different interiors, front and back changes, and coil springs at back in 2000 when it completed 50th anniversary and then they discontinued the maruti 800 in 2010 or 2012.
However, PAK suzuki just made mehran plus in 2000 and then they introduced efi models from 2012 onwards and still sold the same crap with minor changes till 2019.
the japanese versions that came with rear coil springs are much smoother than out coil springs