ERFs with 4MW cabs RHD & LHD

@Anorak: I think you’re not wrong, so print this and you have it written.

As said…MV (later MW when sleeper) and the numbers 1,3,5 7 for back
set- and 2, 4, 6, or even 8 for front set-axle, will no doubt refer to the
versions and several important modifications…let’s proceed that way!