Learning Gearbox?

[B1ondini]

Now, I know that some models are fitted with inteligent auto-boxes which learn and adapt to your current driving style, but what I want to know is when did MB start using this technology?

I have a 1995 E220 petrol and was wondering if mine is fitted with something that is more inteligent than I am!!

Hopefully one of you will be able to help me out.

Thanks,

Scott

 

[television]

It was introduced with the start of the 5 speed boxes,I think around 96/97 normally used with the start of an engine change. What it does beats me, I had it first on my 98 volvo and my newer 99 Merc has it.
I have looked at the ECU's diagrams on both types and cant see what it does. as for driving, its always in the right gear at the right time and it does not matter how hard or slow I drive. the only possible intelligent answer that I have is, if I was in a hurry with the non intelligent box I would move the shift back to 3 getting ready to overtake, with these boxes I have never needed to do that.
What does anyone else out there think. Malcolm

 

[sleepezy]

Never seem to be short of power myself...

However, several people have mentioned a significant improvement in performance if the system is reset - method below.

I don't know if its just in the mind (didn't notice any difference myself) or not, and I do not claim any cred for working this out - just was posted on another site.

All (recent Merc) gearboxes learn and adapt to your driving style (some throttle as well). I thought that they adapted fairly quickly - i.e. if you started hooning as a change from a sedate cruise it picked up on this and sped-up gear changes quicker - the commentary i have seen contradicts this - as i said i offer no opinion here. And yes, it does seem to me that the process whould reset the throttle position sensor, not gearbox, that is a discussion we are having!

The long way to reset the gearbox memory is to disconnect the battery for 30 minutes - but follow this quick procedure and it can be done in a couple of minutes!! Give it a try yourselves and post the results if it works!!

" 1. Get in your car, it doesn't matter if you close the door or not.

2. Turn the key to the on (not start) position, the position just before the starter turns over.

3. Press the gas pedal to the floor with the key in the "on" position.

4. Hold the pedal to the floor for five seconds, then turn the key back to the "off" position (don't remove the key), then release the gas pedal.

5. Wait 2 mins for a full alignment.

6. Drive the car as you always do.

Intersted to hear if you sense any change

 

[television]

No mention of this on WIS cd

I have all of the technical manuals for these gear boxes, both from Volvo and Merc (same box) and 15 WIS cds there is no mention of a re-set in any of them. If you study the ECU there is no memory as such.
Disconecting the battery on some cars requires a reset of all functions.
Malcolm

 

[television]

Never seem to be short of power myself...

However, several people have mentioned a significant improvement in performance if the system is reset - method below.

I don't know if its just in the mind (didn't notice any difference myself) or not, and I do not claim any cred for working this out - just was posted on another site.

All (recent Merc) gearboxes learn and adapt to your driving style (some throttle as well). I thought that they adapted fairly quickly - i.e. if you started hooning as a change from a sedate cruise it picked up on this and sped-up gear changes quicker - the commentary i have seen contradicts this - as i said i offer no opinion here. And yes, it does seem to me that the process whould reset the throttle position sensor, not gearbox, that is a discussion we are having!

The long way to reset the gearbox memory is to disconnect the battery for 30 minutes - but follow this quick procedure and it can be done in a couple of minutes!! Give it a try yourselves and post the results if it works!!

" 1. Get in your car, it doesn't matter if you close the door or not.

2. Turn the key to the on (not start) position, the position just before the starter turns over.

3. Press the gas pedal to the floor with the key in the "on" position.

4. Hold the pedal to the floor for five seconds, then turn the key back to the "off" position (don't remove the key), then release the gas pedal.

5. Wait 2 mins for a full alignment.

6. Drive the car as you always do.

Intersted to hear if you sense any change

Does this mean that you are late for work, and you put your foot down so that when you get home you have to disconect the battery before you can take the wife and kids to Tesco, No adaptive means what it says

 

[sleepezy]

Some members were claiming that over a period of time the gearbox responsiveness permanently slowed down and failed to adapt to a harder driving style. Nobody was claiming they wanted to go the other way i.e. it helped smoother driving.

As I said - just repeating what I heard elsewhere - I didn't find any difference on my car at all.

 

[angus falconer]

Some members were claiming that over a period of time the gearbox responsiveness permanently slowed down and failed to adapt to a harder driving style. Nobody was claiming they wanted to go the other way i.e. it helped smoother driving.

As I said - just repeating what I heard elsewhere - I didn't find any difference on my car at all.

I notice it the C43 - if just dawdle about it short shifts into high gears as soon as it can. If I really floor the throttle and red line it in one of the gears it will hold the next gear far longer before changing up. After a bit of thrashing I then calm down a bit and it responds by returning to pipe and slippers mode.

 

[996jimbo]

I notice it the C43 - if just dawdle about it short shifts into high gears as soon as it can. If I really floor the throttle and red line it in one of the gears it will hold the next gear far longer before changing up. After a bit of thrashing I then calm down a bit and it responds by returning to pipe and slippers mode.

Me too.

It's noticable after doing a couple of quick bursts say on a bendy bit of road then calm down; the first couple of shifts after (me) calming down are a bit perky then the gearbox returns to casual mode.

So far as always being in the right gear - it's not predictive so I find it quite often isn't in the right gear for sporty driving. If I want to boot it out of a corner I manually stick it in third on the way in otherwise it will automatically change down on the way out and I don't get any drive until after the bend. Not always but often.

 

[B1ondini]

But does anyone know when these gearboxes were introduced??

Scott.

 

[djb]

I notice it the C43 - if just dawdle about it short shifts into high gears as soon as it can. If I really floor the throttle and red line it in one of the gears it will hold the next gear far longer before changing up. After a bit of thrashing I then calm down a bit and it responds by returning to pipe and slippers mode.

the effect is time related Ithink as when on Mway on steady cruise, after an hour, the box is definately in sedate mode on leaving.

 

[angus falconer]

But does anyone know when these gearboxes were introduced??

Scott.

Not sure - think the C43 box is the one from the S class of the time. Earliest C43's were 1998.

If I am right they came out when the then S-class was launched.

No idea when that was

 

[television]

ECU's are linked

On this type of box the ECU in the box exchanges and recieves information from the engine ECU in the engine managnent. From this info the ECU can workout the best ratio and when to lock up.

Malcolm