Taking off and stopping is jerky

[saflang]

Originally Posted by ILSMKU

Has anyone else noticed that if you roll the car back, the brakes will pulse? Im aware that or cars have hill assist. Which keeps brake pressure on for a few seconds after you use them so you dont roll into a car behind you or something.


But once they have fully let go and you just roll back, mine brakes will pulse by themselves. As if my rotors are badly warped or Im actually pulsating the brake pedal.

I assume this is to not let he car gain backwards speed?

Mine does this as well, just thought it was the car reminding me I'm rolling backwards.

[BIGW0RM]

Originally Posted by saflang

Mine does this as well, just thought it was the car reminding me I'm rolling backwards.

Ah... I figured it was, but just wanted to confirm. Thank you!

[JOHNBMWM5]

Originally Posted by M6-Coupe

I recall months ago there was a thread and most of M5 guys mentioned that their car start from 2nd gear at stop and go! I have never experienced this with my M6 and I was wondering if M5 is set like this but M6 not

YES my new M6 GC CP starts in 1st gear

[Fantasm]

I have no issues with jerkiness on M5 in Sport+. Never had an issue on my 2013 M5 (no CP) or my 2014 M5 (w/ CP).
I can either slightly push gas pedal to get moving gradually or faster... are you sure you guys are just not controlling the throttle finely enough with your foot?

Have you broken in your clutches?
I know when my cars were new, they wouldn't roll back on hills that easily but after breaking them in and using them, the car rolls back pretty easily now when gas isnt being pushed.
Perhaps the jerkiness is from the clutch being too "grabby" due to not being worn in all the way yet.

[bimmer-boy]

Originally Posted by mimustang

Problem solved!

Picked up the car from the dealer tonight and the problem has been corrected. Car now operates as I think it should. Dealer went through and reset all of the adaptations. Text from the service tech is as follows:

"No faults stored. Completed trans adaptations reset for clutch, shifting and valves. Noted M1 and M2 drive logic buttons were set to start at 2nd gear. Removed setting. "

Not sure where/how/when the 2nd gear start setting were established, but pretty sure the adaptation reset corrected a bad behavior that the car learned. It now starts off from a start like the 535xi loaner that I had today while they worked on my car.

Hi, so your car used to start off in gear 2 now that has been removed?

Or it now starts of in gear 2?

And your problem is solved

[JOHNBMWM5]

Originally Posted by bimmer-boy

Hi, so your car used to start off in gear 2 now that has been removed?

Or it now starts of in gear 2?

And your problem is solved

Hi My car is starting in 1st gear which it should not in D1, it should be in 2nd gear to pull away smoothly.
Mine is going in for a check tomorrow, it needs the gearbox adaptations reset.
Enabling 2nd gear start offs. My LCI M5 always started off in 2nd gear in D1.

[BIGW0RM]

Originally Posted by JOHNBMWM5

Hi My car is starting in 1st gear which it should not in D1, it should be in 2nd gear to pull away smoothly.
Mine is going in for a check tomorrow, it needs the gearbox adaptations reset.
Enabling 2nd gear start offs. My LCI M5 always started off in 2nd gear in D1.

Interesting... I will have to see what mine is does in D mode. I usually manual mode when I drive it.

[bimmer-boy]

Originally Posted by JOHNBMWM5

Hi My car is starting in 1st gear which it should not in D1, it should be in 2nd gear to pull away smoothly.
Mine is going in for a check tomorrow, it needs the gearbox adaptations reset.
Enabling 2nd gear start offs. My LCI M5 always started off in 2nd gear in D1.

Hi John, how you finding the car otherwise compared to the m5..

Saw a m6 GC in person, it was a lot bigger and longer than I thought

Nice tho

[mimustang]

Originally Posted by bimmer-boy

Hi, so your car used to start off in gear 2 now that has been removed?

Or it now starts of in gear 2?

And your problem is solved

Had two problems. First was the very rapid clutch engagement on start-off causing "jerkiness". It was either crawl to an awkwardly long smooth start or put your head back into the headrest and take off. Best I can explain is that the clutch was either on or off.

Second problem was that periodically, in any of the drive logic modes, it would not shift into 1st gear at a stop. 2nd gear start added a different dynamic to the jerky take off from stop. 2nd gear start was not all the time, perhaps 1 in 4-5 drives. Once the 2nd gear start was happening, I could force it into first by switching to "S"sequential mode and then popping back to "D".

Both seem to be resolved. Launches smoothly and it starts in 1st gear every time. Tech said that it was set to "start in 2nd" somewhere in the drive logic programming. I have never seen that in the menus I can see - must be something they found with other tools.

[BIGW0RM]

Originally Posted by mimustang

Had two problems. First was the very rapid clutch engagement on start-off causing "jerkiness". It was either crawl to an awkwardly long smooth start or put your head back into the headrest and take off. Best I can explain is that the clutch was either on or off.

Second problem was that periodically, in any of the drive logic modes, it would not shift into 1st gear at a stop. 2nd gear start added a different dynamic to the jerky take off from stop. 2nd gear start was not all the time, perhaps 1 in 4-5 drives. Once the 2nd gear start was happening, I could force it into first by switching to "S"sequential mode and then popping back to "D".

Both seem to be resolved. Launches smoothly and it starts in 1st gear every time. Tech said that it was set to "start in 2nd" somewhere in the drive logic programming. I have never seen that in the menus I can see - must be something they found with other tools.

Interesting... I will ask my dealer to reset my adaptations too.

[JOHNBMWM5]

Originally Posted by bimmer-boy

Hi John, how you finding the car otherwise compared to the m5..

Saw a m6 GC in person, it was a lot bigger and longer than I thought

Nice tho

It is very good all round, more knee room in the rear seats by a mile (better than M5),better steering / handling, puts the power down better, looks better,and quieter over bad road surfaces.
IF you can get one with a heavy discount like I did it's great.

EDIT: it's about 3 1/2" inchs longer and 1/4 inch or so wider, not much in it.

[bimmer-boy]

Originally Posted by JOHNBMWM5

It is very good all round, more knee room in the rear seats by a mile (better than M5),better steering / handling, puts the power down better, looks better,and quieter over bad road surfaces.
IF you can get one with a heavy discount like I did it's great.

EDIT: it's about 3 1/2" inchs longer and 1/4 inch or so wider, not much in it.

Really more knee/leg room in the rear??

[RichDM5]

Had mine in for the retrofit heat protection mat to coolant line recall and raised this with the service tech.

Could not replicate the issue and would not apply any fix unless the issue can be located. Even if it is just resetting the trans adaptations and 2nd gear start settings.

Anyone know a tech in the UK who can do the reset?

[darkz]

I thought this jerky on start to roll and parking was more of a normal design? but it seems like the trans adaptation reset will solve the problem? or does it only solve the 2nd gear start?

[BIGW0RM]

Originally Posted by darkz

I thought this jerky on start to roll and parking was more of a normal design? but it seems like the trans adaptation reset will solve the problem? or does it only solve the 2nd gear start?

I think it is. Im just not happy about it. My E92 DCT was a little jerky, but nothing like this. If fact my biggest issue is more so the brakes.

Holding steady pressure coming to a slow roll ALWAYs ends up with heads jerking forward. Inching into my garage; I look like an idiot doing slam the gas, slam the brake, slam the gas, slam the brake.


Now I see why they call the M5 a beast. It pops, growls, jerks, slams you in your seat, brakes squeal too much. Its just a BRUTE of a car.

[darkz]

Originally Posted by ILSMKU

I think it is. Im just not happy about it. My E92 DCT was a little jerky, but nothing like this. If fact my biggest issue is more so the brakes.

Holding steady pressure coming to a slow roll ALWAYs ends up with heads jerking forward. Inching into my garage; I look like an idiot doing slam the gas, slam the brake, slam the gas, slam the brake.


Now I see why they call the M5 a beast. It pops, growls, jerks, slams you in your seat, brakes squeal too much. Its just a BRUTE of a car.

LOL, i hear ya, it happens to me when Im parking as well, hate it!

[BIGW0RM]

Originally Posted by darkz

LOL, i hear ya, it happens to me when Im parking as well, hate it!

Isn't ridiculous!

We look like a complete idiots parking our cars in tight spots!

[greentrbo95gst]

Lol, time to get your feet checked. No issues with gentle take offs and breaking in my car, even with all the mods.

[NavidEsq1]

So has anyone that posted on this thread permanently gotten the issue fixed? If so, how? I am having the same problems with a jerk when taking off after a stop on a bran new 2015 M5.

[JOHNBMWM5]

I had this in my M6 GC CP new in october, the software was reloaded onto the car, it's better now.

[BIGW0RM]

Originally Posted by NavidEsq1

So has anyone that posted on this thread permanently gotten the issue fixed? If so, how? I am having the same problems with a jerk when taking off after a stop on a bran new 2015 M5.

I gave up. I have latest software, I test drove a 2015 and it did the exact same thing. It sucks...

[RPiM5]

Originally Posted by greentrbo95gst

Lol, time to get your feet checked. No issues with gentle take offs and breaking in my car, even with all the mods.

This. Owners just need to learn throttle management.

Because of this, I have decided to make a new video next month displaying driver error when taking off from a dead stop. Like Greentrboghst95 has said, I have experienced no issues with this even with mods.