C180 722.4 shift points - Mercedes-Benz Forum
 
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post #1 of 6 (permalink) Old 06-22-2019, 09:11 PM Thread Starter
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Date registered: May 2019
Vehicle: W202 C180 1995
Location: Phuket, Thailand
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C180 722.4 shift points

I have a 1994 C180 with the 722.4 gearbox. I want other owners opinions on when it should shift with your foot flat down.

I have just recently done a fluid and filter change. I drained the torque converter too. But this didn't change the wide open shift points.

The car shifts early in my opinion. It seems to shift through all gears at around 3500 - 3750 rpm if you are at full throttle.

If I shift it manually starting in 2 it will rev out as I would expect. If I then manually shift to 3 again it will rev out no problem only changing when I then manually select D

It can also reluctant to kickdown. It will kick down at low engine speed but not if it is going to bring the engine speed above the 3500 - 3750 range it seems to like. Again if manually downshifting from d to 3 it works and gives me the power for say an overtake.

Once into 4th it will rev past the the 3500 range.

The transmission shifts smoothly. Changes into reverse without a clunk or fuss. Changing the switch from E to S does make it hold gears a little longer before changing up on low/part throttle but it will still change at the same RPM range when at full throttle.
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post #2 of 6 (permalink) Old 06-23-2019, 08:35 AM
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Kickdown switch on the floor is bad, it's a common problem and a cheap and easy fix, replace the switch. It should select 2nd / 3rd whenever possible (when the RPMs wouldn't put it above the redline). Other than that, you can adjust the bowden cable at the throttle body to your liking for part throttle behavior. Next time a smug BMW driver tells you his transmission has 11 settings you can reply that yours has as many as you want.
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post #3 of 6 (permalink) Old 06-23-2019, 09:05 AM
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Patman is right on. Bowden cable is the first thing to adjust. Shifting should be adjusted when car is well warmed up. Keep the new kickdown switch clean from dirt and moisture

But I would not have your car shift too high. That is a recipe for damage.
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post #4 of 6 (permalink) Old 06-23-2019, 03:58 PM Thread Starter
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Thanks fellas, I will check on the EPC thing tonight. Is this on the pedal side or the gearbox side - I'm assuming (hoping) pedal side inside the cabin.
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post #5 of 6 (permalink) Old 06-24-2019, 06:32 AM Thread Starter
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I've removed the switch inside the cabin under the accelerator pedal. It seems that the cap that pushes down on the switch has separated and putting the two back together is lose and sloppy. The cap bit won't stay on.

If I push the cap down I can hear a contact type click as if the main body of the switch is working. Just the cap won't settle or fix properly.

Also the accelerator pedal was actually quite lose, surprised it's held on with plastic nuts at the bottom. I think this play in the pedal has contributed to damaging the kickdown switch.

Is there suppose to be some retaining clip or something to keep the cap bit on the main body of the switch?

Thailand Mercedes want near on 100 USD for this sucker when pelican lists it for 22 USD

(Advanced apologies for my poor terminology)
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post #6 of 6 (permalink) Old 06-27-2019, 04:03 AM Thread Starter
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Switch ordered, received and it 100% fixed my issue. Thank you
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