Automatic transmission – emergency mode

[Dave Chaucer]

My 2001 E320 CDi Auto estate (161,000 m) has been sticking in gear not moving up this happens after the car has been driven for about an hour or so; once stationary the vehicle then clunks into reverse and then into drive and clunks as it goes up a gear. I have been informed that this fault could possibly be resolved with a gear box oil/filter change. Or possibly engine coolant leaking into the gear box. Could anyone please give some advice?
Thanks
Dave

 

[andy@pcd-ltd]

Could be a number of things causing it. I.e the battery in the car, electrical plate on the vale body etc.

Best thing to do is get the fault codes read first

 

[Dave Chaucer]

Thank you andy@pcd-ltd.

The vehicle had been standing for sometime so the battery had gone flat; it required a jump start to get running on Friday. I don’t think the cold and the snow helped.

The screen on the dash board initially said one malfunction but then changed to no malfunction. I will put the battery on charge and then book it in to get the fault codes read.

Many thanks.

 

[malcolm E53 AMG]

If the battery checks out ok the fault sounds the same as when my electric plate in the gearbox went, better to have star readout to confirm, there is a fault code for this.

Electric plate circa £150 and with oil and filter change plus fitting £500 all in.

 

[Dave Chaucer]

The garage are saying the problem is down to the fact that the gear box oil has not been changed and as a consequence the gear box ECU has gone.

 

[Dave Chaucer]

The diagnostic test results show

Electronic transmission control

Code Text


13 Component y3/6n3 (speed sensor) is faulty

109 Component y3/6n3 (speed sensor) is sporadically faulty

130 CAN communicate with control unit N15/5 (Electronic selctor lever module control unit) is sporadically disturbed.

148 The torque converter lock-up clutch causes a sporadic impermissible closing


Electronic selector module


P1856-005 Selector lever position has failed


is this serious stuff?

Thanks Dave

 

[andy@pcd-ltd]

I take it the fault codes weren't read on a star machine

Could be two possible faults from the fault codes

One the electrical plate in the gearbox has failed giving the fault code for y3/6n3.
Two the selector module has failed

 

[Dave Chaucer]

Thank you andy@pcd-ltd.

The printout on the paper I have received back says at the top

Diagnosis Assistance System Copyright 1999 Daimler AG no mention of STAR



The garage describe themselves as a Independent Mercedes-Benz Service Centre

Is it not the ECU in the gear box then?

 

[andy@pcd-ltd]

The reason i said it looks like it has not been done on a star machine is the fault codes themselves look a bit strange.

From the fault codes to me it doesnt look like the ecu has gone down. Also from one of your other post is i dont know why they have told you that not changing the oil and filter has caused the ecu to go down i have never seen or heard of this before.

What area are you in.

 

[malcolm E53 AMG]

13 Component y3/6n3 (speed sensor) is faulty

109 Component y3/6n3 (speed sensor) is sporadically faulty

Exactly the same symptoms as mine and fault codes. The speed sensor in mine started to play up and wouldn't change the gearbox up in gear after 45 mins drive and eventually ended up a couple of weeks later locking in 2nd gear permanently. Wouldn't even clear and reset after restart.

New electric plate (contains speed sensor) required.

 

[Dave Chaucer]

Thanks for your replies.

The garage have replaced the gear box filter, 4 litres of gear box oil, installed an electrics kit (A1402701161). They want the vehicle back next week because from a start up the car still clunks into reverse and then clunks into drive. Once in drive the gear stick will not move back into reverse, unless I switch the engine off and start again.

The garage assured me it’s okay to drive, but I am not going to touch it. The garage said they will pick it up on Thursday and finish the job. The garage say they have ordered a part that will sort out the problem.

I asked them if it was down to the battery but they say the battery voltage was 12.9 .

I must say the garage have been very helpful there was also a problem with the wiper which seemed to have a mind of it’s own, the garage said it was down to a faulty switch and have replaced the indicator/wiper arm with a new one completely free of charge. Thanks.

 

[Dave Chaucer]

@ malcolm210 once you had the work done was your car okay?

and andy@pcd-ltd I’m in the Midlands.

Thanks

 

[malcolm E53 AMG]

My gearbox finally locked in second gear and yes changing the speed plate cured the problem with code y3/6n3.

Reading your post again it still might be the gear selector module that is the problem, swappimg it out might be the best route to isolating the fault as you have codes that hint it might be the problem.

Both electrical plate and GSM can be problematic on the 722.6 box. It might help if you do a search on the forum, there is information on GSM issues.

 

[Dave Chaucer]

Thanks Malcolm, a chap from the garage is coming to collect the car on Thursday so I will ask them if it’s the gear selector module that is still causing the issues.

Below is a link with pictures that explains how to change the oil and filter; if I still have the car in 40,000 miles I might give it a go.


http://www.benzworld.org/forums/w210-e-class/1334827-photo-diy-722-6x-transmission-fluid.html

 

[Dave Chaucer]

I am still having trouble with the gears on the car.

The garage has promised to fit a new floor shift mechanism. But say they are having difficultly getting the part, does this sound usual? The car is a 320 cdi registered in Jan 2001.

Is that (floor shift mechanism) just another term for gear selector module.

Thank you

Dave

 

[andy@pcd-ltd]

Just had a quick look where i get my parts from and they have a selector module on the shelf.

Would need full chassis number to confirm that is the correct one for your car

Or are the garage trying to get a second hand one for you

 

[malcolm E53 AMG]

Hi Dave, sorry to hear you're still trying to resolve the problem.

Who is doing the work on the car and are they MB specialists?

When you say you are still experiencing problems can you be more specific ie, is it a selection problem with the GSM or a shift problem between gears when the car is being driven?

Before the speedplate was replaced on mine the gearbox did clunk into drive and reverse but this was not apparent after the the unit was changed.

It may be an idea to give the car a good run to let the gearbox ecu settle in with the new components.

Might also be an idea to have the gearbox ecu checked for oil ingress and poor contacts.

 

[rjevon]

I am still having trouble with the gears on the car.

The garage has promised to fit a new floor shift mechanism. But say they are having difficultly getting the part, does this sound usual? The car is a 320 cdi registered in Jan 2001.

Is that (floor shift mechanism) just another term for gear selector module.

Thank you

Dave

Which garage are you using ?

I always use WDM in Perry Barr - Mercedes Independant.
http://www.wdmcarsmercedesspecialist.co.uk/

They have always been cock on with my ML270, and always use genuine parts.

PS I do not work for them !!

Richard

 

[Dave Chaucer]

Thanks Andy, the garage is an independent Mercedes specialist and they said they purchase parts from the same place as the main dealers (a supplier in Milton Keynes). The chassis number is WDB2102262B275097

Thanks Malcolm, the issue is from a start up, the gears clunk into reverse and then clunk into drive. If I then stop the car to attempt to go into reverse the car will not move from neutral. I have to stop the engine turn the car off and start again. Also the lights on the dash board indicating P, N or D don’t show up.

However I have found that if I start the car run it in park for about two minutes turn it off and repeat the process and start it up for a third time the car then goes into gear as normal and the lights on the dash board work.

I have not been driving the car because I don’t want to damage it and the garage has said they will resolve the problem.

 

[andy@pcd-ltd]

Hi Dave

Just looked up the correct part now to chassis number and my local dealer has two on the shelf in stock

The part number i make it is A2102670524

So might be worth calling your local dealer and seeing what they say.

Do you know if there are any fault codes stored in the system now