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Old 08-21-2001, 09:20 PM
CJ CJ is offline
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Car doesn't shift and is much faster.

I have a 1991 300D 2.5, and I was on my way driving to work...I backed out of my driveway, put the car in drive and hit the gas. he car was very quick, but it did not shift up to the next gear. I slowed down and hit the gas again, but still no shifting to the next gear. I stopped, put it in park then D again and rove off. It then drove normal, but it was not as quick. It seems almost like it was starting in a lower gear, which I liked, but it did not shift. Later on that day I checked the fluid level and it was ok and clean. the tranny had the filter changed about 10,000 miles ago. The are no leaks or any other symptoms and I was not doing any work on the car in which I may have bumped or knocked anything.
What gives??
The car drives great and has not exhibited any tranny problems ever nor has it repeated this one again???
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Old 08-22-2001, 07:08 AM
CJ CJ is offline
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has anyone else encountered this problem? I can't imagine that I am the first.
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Old 08-22-2001, 12:32 PM
A. Rosich's Avatar
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Join Date: Nov 1999
Location: San Jose, Costa Rica
Posts: 883
My previous 1981 300TD one day (after a regular service) decided when cold to accelerate to maximun r.p.m. in first gear, stay there for a few seconds and then it would jump into second (braking your neck at the same time).

The problem would solve by itself once the engine heated up a little.

The M.B. dealer, in charge of the regular service, took back the car and kept it for three days trying to figure out what the problem could be.

They found out that the mechanic who performed the oil filter change have switched two hoses of the vacuum system that commands the gear changes on the auto transmission.

Maybe that day you had an intermitent problem with the vacuum system. Who knows? Although, I am not sure if the W124s autos work with vacuum as the W123s autos did.

Just a thought.

A. Rosich
S320, 1998
E320T, 1995
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Old 08-22-2001, 03:02 PM
Michael's Avatar
Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
When I first picked up my '92 300D 2.5turbo it had the same problem a few times. It did indeed have vacuum issues (the tranny does rely on a vacuum pump, which in my case had failed), so we replaced the pump. No problems since
"If everything seems under control, you're simply not going fast enough" --Mario Andretti

1995 E500 street car
1986 Porsche 944 Turbo S track car
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Old 08-22-2001, 03:07 PM
the_good_fellow's Avatar
07 E320 Bluetec 7 pistons
Join Date: Jul 2001
Location: Houston, TX
Posts: 170
Go to Diesel discussion section to see if my fix can cure yours.

subject:83 300SD trans problem.

I've been driving mine like "semiauto" for 2 weeks before I got it fixed. whenever revs up I release the gas pedal and shift it to "N" and back to "D". it will shift to the next gear... Anyway, this is not a fix but certainly it will help it shifts.

09 GL320 Bluetec 65K+
07 E320 Bluetec 43k+
05 Nissan Frontier NISMO 4X4 72K+

07 Kawasaki Vulcan 900 5k+ gone
87 300SDL 158k+ gone
91 300D 113k+ gone
83 300SD 220K+ gone
89 300E sold
87 190E sold
83 380SEL sold

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Old 08-22-2001, 06:23 PM
CJ CJ is offline
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Thank s for the help. I tested the system for leaks, none to be found and no problems since. I am just very curious why it did that.
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