hard shift when cold on 1990 Mercedes-Benz 300CE

vehicle has a hard or no shift from 1st to 2nd when cold but will shift normal once warmed up

Asked by for the 1990 Mercedes-Benz 300CE
1 answer
the vehicle is designed to have a delay on up shift when cold (up shift delay valve)for the purpose of decreasing warm up time of the engine and transmission.