When he says 116 he is referring to the engine, a 4.2 liter V8 in a 420 SEL . The 117 engine is the 5.6 liter V8 in a 560 SEL.

Both cars are 126 chassis though, that is what most of us are more familiar with, the chassis designation.

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Chas

Had a 380SL, 450SL, 380SEL, 420SEL, 500SEL

Got a Euro 500SEC right now.