Body/ chassis numbers

How does MB choose their body/chassis series numbers? For example, the SL series 129 replaced the 107 series. Why not the 108, or 117, or 207? In the military, series numbers are chosen by the year adopted or
by the design prototype version that was finally approved. How does MB decide?
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A blindfold, a wall of numbers, and a dart.....

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Among car manufacturers, the project number that often becomes the platform designator seems to run out of order because some projects do not achieve production status or are products most of us do not know about.
Bill Ditmire Ditmire Motorworks,Inc. 425 White Horse Pike Absecon,NJ 08201 http://www.ditmire.com 609-641-3392
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Occasionally there's logic:
W123 followed by W124 W115 and W116 W208 ans W209
DAS --
--
NB: To reply directly replace "nospam" with "schmetterling"
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ok...w201...w202 followed by w203
but then there was the Strichachter (/8) explain that? .O)

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Alex Hemmerich wrote:

That is a different designation system: The system with e.g. the leading W (as e.g. in W114) refers to the model series, the /8 is a supplement to the trunk lid designation system (e.g. 200) and was used to distinguish the W114 and W115 from their predecessors; otherwise it would not have been clear if by e.g. saying _200_ you refer to a 200 from the W110 series (Heckflosse/ fintail) or the new W115 series. The /8 comes from the year of market introduction 1968 and speaking this combination led to _Strichacht_.
Juergen (once loved his W114)
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