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Matt
Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 20617
Experience:  BEng hons Mech engineering, in auto industry 22 years
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CLS320 march 2007 60,000 miles.Purchased used in Oct 2011 with

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CLS320 march 2007 60,000 miles.Purchased used in Oct 2011 with 56,000 miles. Have driven it very little but on a few occasions after stopping at halt signs or a service station it was stuck in top gear. stopped car pushed gear lever into park put back into drive and pulled away but now stuck in bottom gear. Stopped car, put into park, switched off, restarted and pulled away OK and stayed OK for 60 or so miles.
Please don`t let it mean a new gearbox !
Submitted: 3 years ago.
Category: Mercedes
Expert:  Matt replied 3 years ago.
Hello

are ther any fault lights on for engine or gearbox?
Customer: replied 3 years ago.


Nothing at all

Customer: replied 3 years ago.


No warning lights at all


Joe

Customer: replied 3 years ago.

Your last email says that you have responded but I cannot find anything other than your request for more info. which I did reply to as follows
No warning lights at all


Joe

Expert:  Matt replied 3 years ago.
Hello Joe

I'd take a look at the colour of the transmission oil it should be a dark red colour if its black then its needs changing together with its oil filter. Also check its level with the gearbox warm and just after you've moved the selector through all the positions leaving it for a few seconds in each one and then back to park. it should just run out of the fill plug with a warm engine and the car level

You can top up the box through the side fill plug if required and make sure you use the correct oil for your car as the fluids are not all the same. Some manufacturers recommended a change of the type of fluid - Speak to the local dealer and parts dept - they will advise you on the updated fluid to use..

If that’s all OK then check all the electrical connections of the gearbox, remove each connector in turn and spray with contact cleaner. Check that the wiring to the gearbox is in good condition with no chafing or frayed wire

If this is OK then check the selector lever linkage / cable under the car for any broken parts and or missing bolts as if this is coming adrift then it can rub on the car body or just bind up

Then - you should top up if low and re try it - or, if its level is ok - and condition is ok - then the next step is to drain it off - open it up and clean the filters inside -- refill and retry it..

Often - just doing the above cures many troubles with these - and you certainly can't condemn the unit without doing the above...

So do that and go from there. If you do still have troubles after that - then the next best move is to let a local Auto Transmission Specialist have a look at it -- they can often repair the unit considerably cheaper than replacement..
Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 20617
Experience: BEng hons Mech engineering, in auto industry 22 years
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