Hi,my mercedes a140 gearbox randomly jolts or feels like it slips when I put it into first gear from stationary,my gearbox feels like its going to fall out,its done 68,000 miles and is 9 years old with fsh.Can anyone help.
You indicated 1st gear. Is this a manual or automatic - as you didn't state that.
What do you mean by "it feels like its going to fall out"? What are the symptoms?
Have you check the level of transmission fluid?
Can the transmission be serviced or is it one of thos "life-time fills"? If it can be serviced and its an automatic, the first thing I would do is check the level of fluid. If its a manual transmission, I would do the same thing, but it would most likely be the clutch or throw-out bearing.
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Does it crunch? If you lift the clutch and then press it down whilst trying to get it into reverse as this lets the cogs move allowing you to slip the drive into the gears this may allow you to get it into reverse. So here's the steps:
1 start the the engine
2 drive the car for about 10 kms
3 try and get the vehicle into reverse
4 lift the clutch whilst holding the stick in the gate ( you should feel the cogs turning and shaking the stick)
5 then push the clutch down again
6 if it still won't go repeat step 4/5
if it still won't work then try and get it into reverse whilst stationary and then start the engine it will jolt but can free up the gears!
Its a common and known fault on the Mercedes A140 unfortunately. Mercedes seem to have rectifieded the issue on later A series models but to my knowledge they have never admitted to a problem or had a recall on affected gearboxes.
It is unlikely therefore that you will get much joy from the dealers on this issue. Your best bet might be to source a replacement gearbox from a breakers or even better a reconditioned box with a warranty.
Hi there. Although the Dealer has changed the oil, did they do a 'Stall Test' whilst the gearbox was cold and again when at normal running temperture? If not, that's what they must do firstly. This will identify whether you have a slipping clutch/s. The Honda autobox also includes what is known as accumulators - these control how each clutch is engaged during acceleration. For example, if you are accelerating slighly/smoothly, you want each gear to be engaged gently and smoothly, whereas, when accelerating hard, you need the gear engaged quickly and hard to aviod clutch slippage. Thus, the fact that you are experiencing a hard engagement might mean that an accumulator/s is seized. If that's the case, it will mean that the autobox will need stripping, cleaning and be checked for worn components. Hope this helps, Scottech.