I have been thinking about this regarding the body Saloon shell differences, but looking at the EPC there was only one shell available from MB for both face lift and pre-face lift cars. My understanding was that as more options became available the shell was continually updated to reflect these options so very early 202 shells would not have been able to fit the folding rear seat option, but once the folding rear seat option was introduced all subsequent cars would of been able to take the seat option.