W114 automatic transmission issue. - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 07-10-2015, 04:10 PM Thread Starter
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Date registered: Jun 2013
Vehicle: 1972 Mercedes 250
Location: Newfoundland, Canada
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(Thread Starter)
W114 automatic transmission issue.

Hi again guys. I have a 1972 250 sedan with auto column shift. The car was neglected a bit by the previous owner but i've been making great progress (with the help of this forum) with fixing all the issues it has.

My question today is:

I'm aware of how the shifting works by releasing the gas pedal when you want to shift and then pushing the gas pedal back down.
When I accelerate, it shifts very nicely from first to second gear and then it seems to be difficult to get it to switch from second to third. it won't shift until it reaches quite a high RPM. The car has no tachometer so I don't know exactly what RPM but quite high.When I release the gas it just stays in second until i push the gas back down to reach a high RPM then when it finally does shift, it doesn't shift smoothly, it kinda jerks you back in the seat a bit.

Any ideas? does something need to be adjusted?

Thanks so much.
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post #2 of 3 (permalink) Old 07-10-2015, 06:34 PM
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Date registered: Feb 2015
Vehicle: 1972 W114 250/8
Location: British Columbia, Canada
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Mine is the same.

For what it's worth, my 1972 250 sedan automatic with column shift exhibits exactly the same shift pattern as you describe. It kicks up into 3rd at around 55 mph or so, kicks you back in your seat a bit with the surge. No tach so no idea what the revs are, but they sound highish and if it was a manual tranny I'd have shifted up long before this one does for itself. :-)

I've put on several thousand miles since obtaining my 250 in January 2015, and though I still hold my breath a bit until it hits its cruising gear it's certainly not getting any worse. Nature of the beast, perhaps?

Would also be interested to hear opinions from those in the know as to whether this is "normal", or a symptom of a troubled (ie. worn out) automatic transmission.
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post #3 of 3 (permalink) Old 07-11-2015, 06:21 AM
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Date registered: Oct 2012
Vehicle: 1968 250S, 1991 300se, 1998 SL500, 2x 1977 450SEL 6.9. Past MB's; 300SD, 300E, 300TE, 190E, ML420
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This thread should have adjustment procedure in it.

1972 Mercedes 250 Transmission modulator valve - PeachParts Mercedes ShopForum
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