I would rush that at your own perilHave you guys experienced a longer than mercedes-usual reverse engagement, when you are trying to do a 3 way turn? Like almost 2 seconds?
Yes.Have you guys experienced a longer than mercedes-usual reverse engagement, when you are trying to do a 3 way turn? Like almost 2 seconds?
Good point on the shift preparation. I believe reverse is on the same shaft as first. So rather than one clutch disengaging and the other engaging to shift to the next gear the controller has to disengage the clutch, change the gear, verify the change was successful, and then engage the clutch. If the oil isn't moving completely this will take longer.
So then, this is normal behavior:
As the gearbox oil is cold or very cold (say outside temp is in the 40s F), you put it in first gear and ..... want to cross the busy street into Dunkin Donuts. You wait in D (eco off), see and opening, step on it, nothing happens.
Step again on it , nothing happens.
Step third time, it starts to slowly engage. But if you don't watch it, 1 second later (in C mode) if still floored, it would leap forward.
You want to then park it at Dunkin, put it in reverse, nothing happens (although selector confirms R and reverse camera turns on).
You quickly step on it again, this time slightly slower, it starts to move in reverse and 0.5 seconds later, if still floored, it would leap backwards.
By the time I come back from Dunkin (car did not idle parked meanwhile) and leave to cross busy street, it starts to almost be acceptable. I floor it in D and picks up in like 0.5 seconds later. Then at the first traffic light later, it picks up as soon as you step on it, but sluggish and at the second light it picks up normal.
Does my story reflect what you guys see? Is this life with a Dual Clutch?
The DCT is really two ‘sub-transmissions’.. reverse actually uses both.. that is why you can get a ‘reversing not possible’ message but still be able to have limited driving and limp it for service.I believe reverse is on the same shaft as first.
Great way to describe the dual-clutch and transmission.Another very basic way of conceptualizing a DCT is a 10-speed bike. The two main sprockets are the dual clutches. The derailleur and thereby gears are controlled by your own brain-computer. Even then I too sometimes get confused.