We have no gripes the current generation of auto/stop start from BMW. We have run the numbers with the system engaged and disengaged and it works as advertised to save fuel. It can be manually turned off by the driver by a switch if is so desired but enough people can’t seem to grasp the idea of the system, even though it doesn’t make the driver change their normal driving habits, that BMW is now allowing dealers to set the system to “Last User Mode”.
In “last user mode” if the Auto Start/Stop is turned to the “off” position it will remain that way on the next start up of the car and continue to remain that way until the system is turned back to “on” via the switch.
Editor: This really seems to be about people not coping with change, and not feeling comfortable with the system. Having been driving this everyday for the last year in Germany it is odd when I get into a car that is not equipped with the system (X1 xDrive35i) but I am one for advances in technology and saving every last drop of fuel (it’s not cheap here and I am not a fan of “oil” politics). The impact on the EPA numbers and how this will be calculated in the future is one we are still researching as “by default” the system must be on as per EPA rules, maybe this is a loophole, we are looking into it.
Service Bulletin listed below
SI B12 15 12
The Automatic Start/Stop (MSA) system is a further BMW Efficient Dynamics measure aimed at meeting BMW’s commitment to reducing CO2 emissions and enhancing fuel economy.
BMW, always a leader in innovative technology, will be the first automobile manufacturer to bring MSA technology to all new models.
Automatic Start/Stop systems will become prevalent in the future, as manufacturers strive to meet increasingly stringent emissions and fuel economy requirements.
By automatically switching the engine off when the car is stationary, MSA can improve fuel economy and reduce emissions.
New F-vehicles now incorporate the second generation of MSA (MSA II), which has been further developed to operate in combination with an automatic transmission and the BN2020 electrical system.
A detailed description of the MSA Automatic Start/Stop function can be found in the ICP Technician library under Technical Training course ST1112.
Some drivers have expressed the desire to deactivate this function in certain situations. This can be done manually via the Automatic Start/Stop function button with the LED switched on, indicating that the start/stop function is deactivated.
However, by default, the Automatic Start/Stop function is reactivated each time the engine is started.
At the request of an owner, it is possible to modify this default logic to “Last user mode.”
With this logic, the current MSA’s activated or deactivated setting is stored and used on the next trip.
Note: All new BMW M models have the â€œLast user modeâ€ as the default setting from production.