[onlyoujames]

The transmission goes to neutral and engine stops when I am trying to lift the break paddle while waiting for traffic on start/stop mode.

I sent to car to dealer twice and they did diagnose and even submitted PUMA case to BMW Germany and carried out programming and encoding of GWS as per PUMA case but still could fix the problem.

Just wanna know if anyone is experiencing the same issue. Thanks.

[josec70]

I've not experienced this.

[Miller uk]

Yes have same issue only does this occasionally. Most of the time stop / start works as designed. However completely randomly at the point the car should restart, car jumps into Neutral and ignition is off. You have to restart via the starter button. Car also issues the "Close" alarm, which warns that the car has been switched off in Neutral and could roll away.
Also had occasion where I stop the car, Stop / Start stops engine. Foot on Brake I then select Reverse, and instead of starting instantly, car jumps into Neutral. Have to reposition gear selector in the middle and reselect reverse. Second time round car will start as designed.
Dealership unable to recreate fault as it only does it occasionally. Checked software up to date, no errors being recorded on the cars systems.
Dealership asked for technical advice, whilst I noted down number of instances.
Finally heard today from dealership that new update is available for the car, so they want to load this next week and see if its sorts the problem.
So far I can only find people with new comp packs having this issue.
Speaking with the technician next week, so will advise if this new update is to fix this issue or a more general software update.

[onlyoujames]

Originally Posted by Miller uk

Yes have same issue only does this occasionally. Most of the time stop / start works as designed. However completely randomly at the point the car should restart, car jumps into Neutral and ignition is off. You have to restart via the starter button. Car also issues the "Close" alarm, which warns that the car has been switched off in Neutral and could roll away.
Also had occasion where I stop the car, Stop / Start stops engine. Foot on Brake I then select Reverse, and instead of starting instantly, car jumps into Neutral. Have to reposition gear selector in the middle and reselect reverse. Second time round car will start as designed.
Dealership unable to recreate fault as it only does it occasionally. Checked software up to date, no errors being recorded on the cars systems.
Dealership asked for technical advice, whilst I noted down number of instances.
Finally heard today from dealership that new update is available for the car, so they want to load this next week and see if its sorts the problem.
So far I can only find people with new comp packs having this issue.
Speaking with the technician next week, so will advise if this new update is to fix this issue or a more general software update.

Really appreciate your reply. I have been driving back and forth from my Dealer's service centre a couple of times during the last two weeks however they still couldn't find and fix the problem. One of the master technician even requested an extented overnight roadtest where the vehicle is taken home by him but I refused. I was prepared to record the incident with my gopro and show them but now I will wait your update. Thank you.

[mhh]

This just happened to me. It’s different from the earlier problem I mentioned in another thread, but just as annoying.

[F90_M5]

I think I experienced this once within the first week of delivery.

[onlyoujames]

Originally Posted by F90_M5

I think I experienced this once within the first week of delivery.

I am trying to record the moment with my GoPro in car and show it to my dealer. In the meantime, just hoping there is a new software update will fix it.

[Miller uk]

Car is in at Dealership today. Technician confirmed that the new update is a general software update, no notes specific to this problem. However it is updating nearly all of the control units on the car, and as a consequence they hope this may resolve the issue. Will run it for a couple of weeks and see if the issue returns.

[onlyoujames]

Originally Posted by Miller uk

Car is in at Dealership today. Technician confirmed that the new update is a general software update, no notes specific to this problem. However it is updating nearly all of the control units on the car, and as a consequence they hope this may resolve the issue. Will run it for a couple of weeks and see if the issue returns.

I will check with my dealer's technician and see if there is any new updates after he reprogrammed my car last time. Thanks for the update.

[Miller uk]

Had the software update about three weeks now and had two "start stop" failures as described in the thread, so it doesn't look like it's worked. Resigned to the fact it will never work, nor will the dealership be able to fix it

[mk1-fan]

Originally Posted by Miller uk

Had the software update about three weeks now and had two "start stop" failures as described in the thread, so it doesn't look like it's worked. Resigned to the fact it will never work, nor will the dealership be able to fix it

That is disappointing to hear. It sucks when a car have intermittent electronic failures that can't be logged at the dealership.

For whatever it is worth. My wife's then new GLE350D, had within 3 months of buying it, experienced electronic problems. The car would go into limp mode, regardless of driving or engine conditions. It would do it right after start up, or only after half an hour of driving. The car went to the dealership 4 times in the next 3 months, and even after changing many electronic components, the problem persisted.

Friend of mine said he also had intermittent problems on another Merc, a few years ago, and it only got sorted after the whole engine wiring loom were dismantled, cleaned and plugged back in. Did this at the dealership with my wife's car and have been driving it for 2 years now without any issues.

[josec70]

Originally Posted by Miller uk

Had the software update about three weeks now and had two "start stop" failures as described in the thread, so it doesn't look like it's worked. Resigned to the fact it will never work, nor will the dealership be able to fix it

I would not resign yourself to this; unacceptable to say the least. I believe you're in the UK and I was wondering if there are any consumer protection laws similar to "lemon law" in the US?

I would elevate to BMW or have the dealer do it on your behalf.

[lemetier]

Originally Posted by onlyoujames

The transmission goes to neutral and engine stops when I am trying to lift the break paddle while waiting for traffic on start/stop mode.

I sent to car to dealer twice and they did diagnose and even submitted PUMA case to BMW Germany and carried out programming and encoding of GWS as per PUMA case but still could fix the problem.

Just wanna know if anyone is experiencing the same issue. Thanks.

Originally Posted by Miller uk

Yes have same issue only does this occasionally. Most of the time stop / start works as designed. However completely randomly at the point the car should restart, car jumps into Neutral and ignition is off. You have to restart via the starter button. Car also issues the "Close" alarm, which warns that the car has been switched off in Neutral and could roll away.
Also had occasion where I stop the car, Stop / Start stops engine. Foot on Brake I then select Reverse, and instead of starting instantly, car jumps into Neutral. Have to reposition gear selector in the middle and reselect reverse. Second time round car will start as designed.
Dealership unable to recreate fault as it only does it occasionally. Checked software up to date, no errors being recorded on the cars systems.
Dealership asked for technical advice, whilst I noted down number of instances.
Finally heard today from dealership that new update is available for the car, so they want to load this next week and see if its sorts the problem.
So far I can only find people with new comp packs having this issue.
Speaking with the technician next week, so will advise if this new update is to fix this issue or a more general software update.

Originally Posted by mhh

This just happened to me. It's different from the earlier problem I mentioned in another thread, but just as annoying.

By any chance, do any of you recall if this only occurs when the fuel level is below 1/4?

[Miller uk]

The car did it again this morning at the traffic lights and I have a full tank. This fault is completely random, last occurrence was a week ago, you just never know when it will strike. Have taken to switching off start stop but forgot this morning and fault occurred. Dealership cannot recreate it, it's not logging faults, and BMW UK are very unhelpful and uninterested. They just want to push you back to the dealers, who to be fair have been very good, but they are completely lost too. No one seems able to come up with a fix. Big software update added but still occurs. Dealership hoped that would solve it but no luck.

[onlyoujames]

Originally Posted by Miller uk

Had the software update about three weeks now and had two "start stop" failures as described in the thread, so it doesn't look like it's worked. Resigned to the fact it will never work, nor will the dealership be able to fix it

Originally Posted by Miller uk

Had the software update about three weeks now and had two "start stop" failures as described in the thread, so it doesn't look like it's worked. Resigned to the fact it will never work, nor will the dealership be able to fix it

The problem's never happened again since we chatted last time. I am still using my GoPro to record whenever I drove my car. I guess it won' t cure itself so I just wait it happens again and record it for my dealer. We need to get bmw Germany's attention and I think local dealer's technician can't solve it.

[onlyoujames]

Originally Posted by Miller uk

The car did it again this morning at the traffic lights and I have a full tank. This fault is completely random, last occurrence was a week ago, you just never know when it will strike. Have taken to switching off start stop but forgot this morning and fault occurred. Dealership cannot recreate it, it's not logging faults, and BMW UK are very unhelpful and uninterested. They just want to push you back to the dealers, who to be fair have been very good, but they are completely lost too. No one seems able to come up with a fix. Big software update added but still occurs. Dealership hoped that would solve it but no luck.

Do you find cold and wet weather makes it worse?

[Miller uk]

No it's completely random. Yesterday was dry and not too cold for time of year. Car was just up to temp and waiting at lights when it happened. Worked fine ever since. Seems to happen about once a week. Waiting on dealer to come back to me when they restart full service tomorrow. To be honest they are lost and don't know what's next except escalate via their technical team. Problem is they can't recreate it because it happens once every week or so and behaves at other times.

[onlyoujames]

Originally Posted by Miller uk

No it's completely random. Yesterday was dry and not too cold for time of year. Car was just up to temp and waiting at lights when it happened. Worked fine ever since. Seems to happen about once a week. Waiting on dealer to come back to me when they restart full service tomorrow. To be honest they are lost and don't know what's next except escalate via their technical team. Problem is they can't recreate it because it happens once every week or so and behaves at other times.

My dealer in Sydney seems lost too! I will keep you updated with my one and hopefully we don't go down to that track dismantling the engine.

[lemetier]

Originally Posted by onlyoujames

My dealer in Sydney seems lost too! I will keep you updated with my one and hopefully we don't go down to that track dismantling the engine.

HIS unit on the transmission possibly since the low fuel level quirk doesn't appear to be the issue. With MSA active, the accumulator assembly holds enough pressure to engage the transmission output just before the engine restarts. If it loses pressure, idle isn't high enough to prevent the engine from stalling along with the trans going into neutral.

If I'm reading this right, it requires a 6 hour diagnostic test to register a hard fault, otherwise DTC evidence of it occurring isn't retained.

[Miller uk]

Thanks for your comments. I will pass along to the master technician looking after the case and let you know what they suggest next.

[lemetier]

Originally Posted by Miller uk

Thanks for your comments. I will pass along to the master technician looking after the case and let you know what they suggest next.

There's one other potential cause that won't trigger any DTC's to eliminate first. Noticed all of you who have experienced it are mentioning lifting of your foot off the brake pedal when it occurs. It is possible to induce the condition yourself through brake application that drains the vacuum reservoir just enough with the engine off to cause the symptoms. I'd first try to use Auto Hold and remove your foot from the brake pedal completely after coming to a complete stop. If the stalling continues to occur following throttle application only MSA restart, then further diagnostic measures are appropriate.

[Miller uk]

Thanks again for your help. In my case I have had this happen with auto hold on and with the active cruise control on. So with auto hold on I touch the accelerator to start car, with active cruise control , or if the car registers the car in front moving, it starts itself without any input from me , or with auto hold off I lift off the brake. 99 times out of 100 the car works perfectly, but completely randomly, about once a week, in any of the above situations, at the point of a restart , the restart fails and car jumps into neutral. Car is left in "ready state" with engine off. Display shows "close" alarm as if you had switched off from the button in Neutral to warn of roll away risk. Been taking a bit more notice recently to try and give the dealership a clue as to what's happening. At the point of failure starter motor kicks in for a micro second and sounds more like a high pitch whine than normal, it's as if the starter gets a signal to start but is them almost immediately stopped and car goes into neutral as described. Also note that if auto hold was on it stays on , the parking brake does not disengage. When you restart car it's like you have started from fresh with rear seat belt lights illuminating. Dealership confirmed they are re opening my PUMA case as the software update they hoped would solve it has not. Will let you know how the case develops. Car is 4 months old and did it from first week of ownership. What is frustrating is the random nature of the fault and inability to recreate for dealership.