Question about Mercedes-Benz E-Class

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Jerking accelerating Low gear shift (1st to 2nd) jerks when engine is cold.

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  • Zulhaimi Shamsudin
    Zulhaimi Shamsudin Apr 28, 2014

    My mercs is a 2004 E240 V6 2.6 litre W211. Currently (has been a year at least) it has a very bumpy gear shift fron 1st to 2nd when cold, in the morning or whenever I put on the road first time in the day. I've changed the ATF, gearbox gasket, and O ring, but the problem still persists. Please adviice. Thank you.

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  • 6 Answers

This may be normal but you can adjust your driving to reduce the impact. To speed up the warm up process of the catalytic converters, the power train computer holds first gear a little longer than normal. This causes your car to get higher in the rpm range than normal, at part throttle, which causes the hard shift. On your first drive, try NOT to accelerate while the car is in first gear--it won't take long for you to learn how far this is.

Posted on Jul 13, 2014

  • James Friesen
    James Friesen Jul 13, 2014

    On cold startout, the PCM holds our cars in first gear a little ways to quickly warm up the catalytic converters. this is normal, and gets the engine running MOST efficiently, as quickly as possible. If you continue to accelerate with the car held in first you will get a part throttle hard upshift. Watch your tach and try NOT to accelerate to much while the car is held in first gear. You will quickly learn how far this is and your up-shift will be softer!

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SOURCE: 1999 Olsmobile Alero

sounds like bad clutches in trans...tranny shop needed...takes 4 qts for a filter change and remember to check it when the vehicle is warm and in park running.

Posted on Aug 29, 2008

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SOURCE: 1997 Mazda protege transmission, Hard shifting from 1st gear

I would try a flush. If its set up like my 96, and it likely is, changing the trasmission gasket and filter will be difficult. Mine has a medal plug on the bottom and takes an allen wrench, and possibly a breaker bar. If you take out this plug, drain, flush then refill via the dipstick tube and a funnel, it may help. You may need to do this a couple of times due to fluid still in the torque converter, pan, etc.
Lucas is good stuff, I would add it again when I was done. The tranny fluid should be pink, mine looked like used oil black before I flushed it.
Also, when adding the new fluid, shift slowly up and down through all of the gears to lube well and check your fluid levels after 100 miles or so, as sometimes a bubble will form and make it look full....then not after it pops.

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SOURCE: 2000 mazda bogging in all gears especially in 1st and 2nd gears ?

Judging from what i know, the timing on the engine is probably a bit off, and i remember reading the exact same problem on another web site and that is also what they said. So just check the timing on the engine or have it checked by a mechanic if you don't know how to do it.

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SOURCE: Shifts hard and jerks under hard acceleration.

thottle positioning sensor? if trans has overdrive could be a lock up piece, dont remember name of it. there is a lucas oil product that might help. if it is the overdrive.

Posted on Nov 06, 2009

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