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#1
12-02-2007, 10:53 PM
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Transmission Problem Mercedes 300E 1991?
I have a Mercedes 300E 2.6 from 1991, 240K miles. When I turn the key and start driving the car right away, it takes too long to change shift to second. If I turn the key and wait 5 min, the car runs fine. 3 months ago I changed the A/T fluid which was not a Mercedes brand (Dextron 3). Could that be it, or is it another problem.
Thanks, 
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#2
12-02-2007, 11:08 PM
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I could be wrong, but I think it is having to do with vacuum building up. My '91 300E w/ 192K does the very same thing. I just take it easy for the first mile or so... Especially does this in cold weather. I'm pretty sure this is very normal...
-GH
__________________
For Now: 1992 Mercedes Benz 500SL 1998 BMW 528i 2003 Honda Element 2002 CBR600F4i 1977 Coachmen Motor Home
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#4
12-04-2007, 01:04 AM
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What do you mean exactly by "it takes too long to change shift to second" Does the actual gear change take too long or does it just keep it in 1st gear longer (higher revs) than normal?There is an intended delayed upshift with a cold engine. The higher revs are supposed to heat up the catatlytic convertor faster. Could that be what you are referring to?
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#5
12-04-2007, 08:27 AM
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LIKE "ace" has suggested...ALL USA version MB gas powered cars starting in 1990 with auto transmissions have UP-SHIFT delay to allow catalyst warm-up.
100% normal!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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