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Old 12-15-2001, 11:46 PM
Registered User
Join Date: Dec 2001
Location: Chicago
Posts: 100
Unhappy Transmission

Hello all

I recently purchased a 1993 400SEL and I love it, but I notice some times that it takes a few seconds to shift from first gear to second which causes the engine to rev for that period sending the RPMs a bit high.

I am concerned that my Transmission is slipping, but I also know that there is a Transmission Up-shift Delay Solenoid Valve, so that can be operating incorrectly.

I have been driving it for about a month and it happen three times only.

I am also thinking to replace the original radio but I am not sure of any complications to the Boss system that is already in the car.
I only plan to replace the head unit and not any other parts or add any other equipment.

Any ideas and/or advice will greatly be appreciated.
Old 12-17-2001, 03:18 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,126
Most MB transmission stay in low gear for a while when cold to help warm up the catalytic converters. I woulnd't worry about it unless it holds low gear when the engine's warm.

91 300SE
81 300SD
Old 12-17-2001, 07:36 PM
ymsin's Avatar
Driver, Mercedes-Benz
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
I experience a similar thing with the 126 - more pronounced when the engine is cold.

It could be just the character and nothing to worry about.
... Kerry

126 tailed by a 203, 129 leading the pack.
Old 12-26-2001, 11:38 AM
Registered User
Join Date: Dec 2001
Location: Chicago
Posts: 100
Thanks for the input.
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