hardyli

This is only happening when the engine is cold. When I start from a traffic light stop, I release the brake, give just a little gas, and then it feels the throttle would open too much and quickly close down to what it should be. Once I drive it for ~3 miles and the engine is warmed up, the acceleration becomes linear again. Does anyone know if this is normal or what component I should check or clean?

PeterUbers

Are you in C, S, S+, details help

My instinct and knowledge about this platform tells me that this is pretty typical and things that people would complain about even when they bought the car brand new, this car is new to you then you need to get used to driving this type of MCT transmission as it's very different than a torque converter-based transmission. This is one of the nuances. That being said if you provide more details we may be able to help you figure out if something needs to be modified such as a re-adaptation of your wet clutch in the MCT or a re adaptation of the transmission in general

hardyli

Thanks Peter! I only put it in C mode when cold. So I only observed in C mode. It could happen in S/S+ as well but I never put in S/S+ when cold. I will try that tomorrow morning and report back.

Hakon74

When it is cold outside, the trans will start off on 2nd gear (regardless of C/S/S+ selected setting) until it reached a certain temp, usually the warm up does not take very long. But during this time, cold fluid / pulling away in 2nd I do find the clutch engagements to cause the car to jerk a little when pulling away from a standstill, only.

EckFe1

You'll have to pull the choke all the way out, at least for a couple of miles. This should help.
BTW, that's pretty normal behavior. Gearbox starts in 2nd, gear oil is super cold and the clutch mechanism has a hard time trying to engage smoothly. Typically stops within the first take off. At least on our side of the shore.

crazybear

same thing happens to me in the mornings when cold; goes away after the car warms up. I've gotten used to it and just gently press the gas pedal to get it moving.

FastWgn

LOL - I actually did laugh......

Classic!

PeterUbers

+1000

this is just never going to be a car you can just turn on when it's a cold engine and expect it to drive normal ... your foot gets used to it tho

hardyli

Thank you folks for chiming in with your experience! I can live with it. Just hopefully my wife won’t use this as a reason to replace my E63 with a Tesla someday lol.

PeterUbers

lol ironically Tesla and any EV may have the best throttle tip in of any car period amen

hardyli

Exactly! And very low maintenance cost. I can understand why many people don’t understand why we’re buying V8s instead of Teslas.

Skuld

I'm experiencing this same thing now with my E63, and I got this same behavior with my CLA45 and that had a DCT. Particularly in cold weather.

hardyli

Sorry I forgot to update this thread. I took the car to the dealer and the SA seemed to immediately know what I was talking about and said it’s normal for these bi-turbo V8s. It probably takes longer time to circulate all kinds of fluids when cold. If it missed a gear, it would pop a code immediately.

Skuld

Thank you! this is helpful... I've been letting it run a bit before heading out when cold starting.

PeterUbers

Just feather the throttle a bit when cold and it'll warm up nicely as you pull away - your foot will develop a "foot memory" to make this seamless in the future like driving a manual transmission/clutch