Auto Gearbox problem, Not shifting out of 1st gear. - Page 2 - Mercedes-Benz Forum

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post #11 of 12 (permalink) Old 01-21-2010, 12:22 PM
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This is all I can find in the WIS about Limp- home mode.
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post #12 of 12 (permalink) Old 01-21-2010, 02:31 PM Thread Starter
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My plot thickens more than ever.
car was in limp mode, i drove it to work (in 2nd gear) so i could get the codes cleared, while it was there, before the codes were read/erased, it decided it wasn't going to start, all ignition lights on, but didnt want to crank. i elliminated the immobiliser by bridging the starter solenoid and it started, but just wouldn't start on the key.
hooked up the diagnostics and no faults in the engine ecu, 5 random faults in the gearbox (havent got them to hand)
cleared them and fixed the problem, now starting on the key, and not in limp mode (although it was still initially in limp mode for half a mile and switching engine off and restarting, i assume its a learning excercise?)
anyway, touch wood it will still be ok tomorrow, and so on...
strange though how a gearbox fault code will prevent the engine from cranking, any ideas why? (1 of the codes was to do with the gear selector, i assume a fault where it thinks its in a drive gear rather than park/neutral which of course will prevent the starter operating, but how could that fault appear when the inhibitor switch is clearly ok. i'm baffled.
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