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10-13-2009, 12:57 AM
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#1 | |||
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Junior Member
Join Date: Sep 2009
Location: Lincoln, NE
Posts: 52
Drives: 2002 Mercedes Benz E320
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'98 S420 won't shift from first gear...
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10-13-2009, 11:42 PM
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#2 |
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Super Member
Join Date: Jun 2008
Location: Bay Area, CA
Posts: 680
Drives: 99' E300
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Guessing you have 1st, 2nd and R only. Is "limp home mode", caused when the trans detects an internal fault that could cause damage.
Needs to be scanned using SDS (MB laptop) or other very high end scanner capable of reading that module. A good MB tech can view trans adaptations values and *see* how the trans has been recently adjusting itself internally to maintain quality shifts and determine the problem. Ammco can't; and will only suggest rplacing with a rebuilt unit. Might check the trans harness and see if fluid has leaked into it. Can wick up to the TCU and fry it and cause LHM. P, R, N and D are mechanical. The rest is electronic.
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T. Allison 85' 300D 311k miles 99' E300 275k miles |
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10-16-2009, 12:46 AM
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#3 |
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Junior Member
Join Date: Sep 2009
Location: Lincoln, NE
Posts: 52
Drives: 2002 Mercedes Benz E320
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So is this like a dealer only fix?
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10-16-2009, 02:59 PM
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#4 |
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Super Member
Join Date: Jun 2008
Location: Bay Area, CA
Posts: 680
Drives: 99' E300
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Depends how handy you are.....there are times where the dealer with their high level of tech is the lesser of evils. Trans, at least as pertains to the diagnosis, is one of those times in my opinion.
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T. Allison 85' 300D 311k miles 99' E300 275k miles |
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10-20-2009, 02:49 AM
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#5 |
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Junior Member
Join Date: Sep 2009
Location: Lincoln, NE
Posts: 52
Drives: 2002 Mercedes Benz E320
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What do you think could have caused this? Long period of sitting?
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10-20-2009, 05:00 PM
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#6 |
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Super Member
Join Date: Jun 2008
Location: Bay Area, CA
Posts: 680
Drives: 99' E300
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Check the harness for fluid contamination.....if you find some, check the opposite end where it connects to the TCU in the computer box.
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T. Allison 85' 300D 311k miles 99' E300 275k miles |
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10-21-2009, 04:05 AM
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#7 |
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Newbie
Join Date: Oct 2009
Posts: 5
Drives: loveki
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Valuable information.
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Looking for cheap uggs classic tall |
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10-26-2009, 09:01 PM
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#8 |
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Junior Member
Join Date: May 2006
Location: San Diego CA
Posts: 42
Drives: 1998 S420 1994 S320 1994 E320
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RPM sensor
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| Tags |
| 1999, 1st, 2nd, 300, alisson, benz, gear, issue, mb, mercedes, s420, sd, shift, shifting, trans, w140, wont |
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