Yeah, that's the interesting part--no clue at all to previous colours, not inside the engine bay (all red, the current colour), not inside the dash, not under the car. Just the strange metallic blue under the shifter cover!
All the engine and chassis numbers match all the metal badges--the Datenblatt is clearly correct. But it must have gone from green to metallic blue to signal red with someone very meticulous at the wheel!
Trice
1968 280SL US, signal red/bl leather, auto, kinder