They tended to put different decals on different models if I remember correctly when I was at the dealer. Even on my own cars, for instance, the '93 300E 2.8 has the "Mercedes-Benz" decal but some S-class cars of the same 'vintage' have the "DB" one. And I'm pretty sure the older 107 SLs didn't come with a decal, or at least mine didn't and I don't recall seeing any 450s or 350s with them on.

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Rgds,
Aaron Greenberg
MB technician
Precision Motorcars, Cincinnati, Ohio
'67 250SE Cabriolet
'77 450SL
'80 300SD
'85 380SE
'86 420SEL
'89 420SEL
'93 300E 2.8
'74 Jensen Interceptor Mk.III
'81 DeLorean DMC12
'84 BMW 745i Turbo