Kickdown

[television]

Are you sure about that. AFAIK kickdown makes the box shift up just as the revs hit the red line in any setting.

The purpose of kickdown is to give maximum accelleration, which would be defeated if an early change came into force.

If you would like the shift program for a 722.6 box let me have an Emaill address and you can see the different shift and kick down points in S and W if you would rather have one for your car let me have the 6 first VIN numbers

And *** if you would like the chart for your car please PM me with Email address

I have done the one for the 210 engine with the 602,604,605,606,611,612 and 613

 

[Friz]

I'm assuming the kickdown switch in a manual is just a dummy. Right?

 

[television]

I'm assuming the kickdown switch in a manual is just a dummy. Right?

Yes you cant have one in manual box car

 

[Friz]

Good. Mine gets enough abuse without me thinking I can make it go faster.

 

[television]

Good. Mine gets enough abuse without me thinking I can make it go faster.

Welcome to the forum as a new member

 

[Dieselman]

I don't need the WIS information, but thanks anyway.

My right foot is quite happy that the change points are 4,700 rpm in both S and W modes.
Well up to the 3/4th change anyway, my drive just isn't quite long enough to get into top gears.

 

[television]

I don't need the WIS information, but thanks anyway.

My right foot is quite happy that the change points are 4,700 rpm in both S and W modes.
Well up to the 3/4th change anyway, my drive just isn't quite long enough to get into top gears.

Its the road speed that is different,at full throttle, not the RPM, how odd that you would not like the read out for your car

 

[Dieselman]

How can the road speed be different in any given gear.?

The engine is linked to the road via the gearbox in a linear relationship.

And I thought we were discussing the gear change points being at lower rpm in W then S.

I've got no issue with that, but kickdown is an override function above and beyond full throttle.

 

[Friz]

Welcome to the forum as a new member

Thanks. Glad to be here.

 

[television]

How can the road speed be different in any given gear.?

.

Full throttle from 3-4 for instance on a 210 is 27kmh more in S than in W

 

[Dieselman]

Is that full throttle or Kickdown.? There is a difference between the two.

If the speed changes then so must the revs.

 

[television]

Is that full throttle or Kickdown.? There is a difference between the two.

If the speed changes then so must the revs.

My post does read full throttle quite clearly

 

[Dieselman]

My post does read full throttle quite clearly

Which is why I asked whether that was kickdown.

So far I assume not.

One can reach full throttle but not kickdown, well you can in my car at least.

That little switch makes all the difference, it will force the box down even from highish revs.

Of course your car settings may be different to mine, or others.

 

[television]

Which is why I asked whether that was kickdown.

So far I assume not.

One can reach full throttle but not kickdown, well you can in my car at least.

That little switch makes all the difference, it will force the box down even from highish revs.

Of course your car settings may be different to mine, or others.

I think that if anyone reading this thread thinks that max throttle road speed is any diffenent to kick down, then they should not be reading it, and this goes for the 722.6 box and should not be confused with others where the kick down is not the same as Max speed as on the 129 722.5 box where from 2nd to 3rd the full throttle road speed is

Full throttle in E 53kmh
----------------S 91kmh
and kick down 98kmh

 

[st4]

Which is why I asked whether that was kickdown.

So far I assume not.

One can reach full throttle but not kickdown, well you can in my car at least.

That little switch makes all the difference, it will force the box down even from highish revs.

Of course your car settings may be different to mine, or others.

This is what I thought. One could regard kickdown as an emergency function to make the car drop into the lowest gear possible and change up at the red line.

In full throttle, i.e. just before you trigger the kickdown the car will accelerate promptly, but a reaction i.e. change in gear may not happen. In kickdown it definately will change down (if the engine speed will permit a lower gear).

I didn't think the W/S (or C/S in W211) would have any affect...

 

[Diesel Benz]

I did not find the info for the W211 E320CDI in question here. I wonder why the 722.5 box behaves as television explains, is that a fully computer controlled box?

The 722.6 has the same shift points at kick-down as at "S" with full throttle, which should mean kick-down with S or W/C would give equal shift points.

At MB they still talk about "full throttle" and "kick down" separately even if those may be the same when kick down is detected from the pedal position sensor and the kick down switch is just a simulated function. I guess the pedal movement speed is still a factor as the full throttle figures for W are different from W with kick-down.

 

[television]

I did not find the info for the W211 E320CDI in question here. I wonder why the 722.5 box behaves as television explains, is that a fully computer controlled box?

The 722.6 has the same shift points at kick-down as at "S" with full throttle, which should mean kick-down with S or W/C would give equal shift points.

At MB they still talk about "full throttle" and "kick down" separately even if those may be the same when kick down is detected from the pedal position sensor and the kick down switch is just a simulated function.

It takes quite a lot of reading as all cars are different

In a 163 full throttle 4-5 takes place at 170kmh and kick down 235kmh.

Down shifts 5-4 is full throttle at 166kmh and kickdown 175kmh

 

[whitenemesis]

I think the give-away is in the name "kick-down"!

If one aproaches full throttle "gently" then the car will accelerate up to the max revs and change up.

If one floors the accelerator the car will "kick-down" to a gear that gives the maximum acceleration and will continue accelerating to max rev and change up to continue accelerating, until one lifts off slightly (or crashes!!). If one is at full throttle and pushes past the slight resistance in the pedal travel the car will "kick-down" to the next gear.

The change points for full throttle will be different in S and W. Kick-down will happen as soon as the throttle is floored S or W will have no effect.

From the handbook -

"Accelerator pedal position
Your style of driving influences how the automatic transmission shifts gear:

• little throttle: early upshifts
• more throttle: late upshifts

Kickdown

Use kickdown for maximum acceleration.

Depress the accelerator pedal beyond the pressure point.
The transmission shifts to a lower gear depending on the engine speed.

Ease off on the accelerator pedal once the desired speed is reached.
The automatic transmission shifts back up."

 

[television]

I think the give-away is in the name "kick-down"!

If one aproaches full throttle "gently" then the car will accelerate up to the max revs and change up.

If one floors the accelerator the car will "kick-down" to a gear that gives the maximum acceleration and will continue accelerating to max rev and change up to continue accelerating, until one lifts off slightly (or crashes!!). If one is at full throttle and pushes past the slight resistance in the pedal travel the car will "kick-down" to the next gear.

The change points for full throttle will be different in S and W. Kick-down will happen as soon as the throttle is floored S or W will have no effect.

From the handbook -

"Accelerator pedal position
Your style of driving influences how the automatic transmission shifts gear:

• little throttle: early upshifts
• more throttle: late upshifts

Kickdown

Use kickdown for maximum acceleration.

Depress the accelerator pedal beyond the pressure point.
The transmission shifts to a lower gear depending on the engine speed.

Ease off on the accelerator pedal once the desired speed is reached.
The automatic transmission shifts back up."

Thes things are not the same over the range, diesels more or less yes but not others,, look at the 163 in post 37

 

[whitenemesis]

I think the differences you are quoting could be covered by the statement under "Accelerator pedal position"?