Gear box fault.....please help - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 01-20-2009, 10:15 AM Thread Starter
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Unhappy Gear box fault.....please help

Hi all I'm the owner of a c220 cdi elegance estate which has a 6 speed sequetronic gearbox. It's done 140K it's an 02 plate. It has a full MB service history. Recently it has started playing up by not wanting to stay in automatic mode. It will only stay in auto on the first drive of the day when cold. After that it will switch to the gears with no warning. The gears are smooth and it doesn't seem mechanical. We were told by one garage it would need new gearbox £3000!! but I took the bull by the horns and rang a Mercedes dealer and they said it could be the gearbox relay. Has anyone come across this problem themselves and is it a straight forward job to repair, and here's the worst bit how much is it likely to cost. They want £100 to diagnose. We want to sell it so have no choice but to get it sorted. They're lovely cars but my god they don't half burn a hole in bank when they go wrong. Car doesn't seem to appreciate there's a credit crunch going on.

Last edited by millymolly; 01-20-2009 at 10:15 AM. Reason: speeling mistake
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post #2 of 3 (permalink) Old 01-22-2009, 10:32 AM
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Could it be transmission fluid overheating only?

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post #3 of 3 (permalink) Old 01-22-2009, 11:27 AM Thread Starter
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We've had a diagnosis today at the dealership and it's saying the lateral acceleration sensor needs changing do you know whereabouts it's located and do I need to have sensor reset after fitting.
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