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Q: hard shift when cold on 1990 Mercedes-Benz 300CE

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
vehicle has a hard or no shift from 1st to 2nd when cold but will shift normal once warmed up
(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.
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