Tinkering with a '77 450SL. Car starts up ok, but cold idle speed is around 1600rpm. Drops to correct level after car has completely warmed up.

What would cause this? This version of CIS has no EHA and no potentiometer, correct? I am going to guess that the system has only mechanical injection with some sort of cold start enrichment device?

Car is a CA model.

Mike

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'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E