06-09-2014, 04:22 PM | #1 |
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Auto start stop function
Hello guys , I've recently bought a X5 35i x drive , and its 1000 km so far , I noticed the auto start stop function seldom working , my pervious X3 was always turning off even in short stops ,
So its normal? |
06-09-2014, 07:10 PM | #2 |
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Depends on what MODE you are in. In ECO PRO it is always on. In COMFORT it should be on. It kicks in if you are idle for longer than 3-4 seconds. In SPORT mode, it is always off to avoid throttle lag of any kind.
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06-09-2014, 08:20 PM | #3 |
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I've found that it doesn't always kick in in hot weather in comfort mode until the cabin temp has reached the desired setting. As mentioned, it always seems to turn off at stops in Eco-pro.
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06-09-2014, 11:11 PM | #4 |
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There are any factors which the auto stop/start feature will not engage. Some of the factors is: engine operating temp, outside temp, battery condition(charge level), electrical draw(AC on defrosters on) performance mode. I am sure there are other factors but these are the ones that I experience in my M3 stop/start when I had it on
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06-10-2014, 04:45 AM | #6 |
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I do not use ASS, as I believe the starter may need replacement sooner. Dealer said the starter is heavy duty to accommodate ASS, yet the manual still warns you. Factors or costs to consider: gas, starter, environment. I did see many taxi's in Munchen use ASS.
Owners manual manual p.67 Certain vehicle components may experience additional wear as a result of this system. The engine is not switched off automatically in the following situations: ▷ External temperature too low. ▷ The external temperature is high and automatic climate control is running. ▷ The passenger compartment has not yet been heated or cooled to the required level. ▷ The engine is not yet at operating temperature. ▷ The wheels are at a sharp angle or the steering wheel is being turned. ▷ After driving in reverse. ▷ Fogging of the windows when the automatic climate control is switched on. ▷ Vehicle battery is heavily discharged. ▷ The engine compartment lid is unlocked. ▷ HDC Hill Descent Control is activated. ▷ The parking assistant is activated. ▷ Stop-and-go traffic. ▷ The transmission selector lever is in position N or M/S. ▷ Use of fuel with high ethanol content. |
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06-10-2014, 05:14 AM | #7 | |
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06-10-2014, 08:39 AM | #8 | |
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One should remember that the start/stop functionality is a system fleet wide trick to get emissions down. This system thinking approach does in my humble opinion not add any personal value to the individual owner. |
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06-11-2014, 06:58 AM | #9 |
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Thanks guys for replay , here in Iraq temps are mostly at 40C and automatic AC always on , plus our fuel octane is less than 90 , all this may lead to ASS to not work .
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06-11-2014, 08:42 PM | #10 |
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Its quite possibly the worst feature of this car. When the system is on, and you come to a stop in traffic, all the lubricating oil drains from the cam lobes causing increased wear, the oil pressure feeding the main bearings drops to zero and allows metal to metal contact (on every start this happens, and slightly adds to engine wear on each start), allows the engine to heat up further (oil and water cool the internal engine parts) and increases the duty cycles to the starter by a factor of X (for most of us, maybe a factor of 10 at least in medium traffic conditions). I think the motors with turbos still have the cooling pump on as normal, otherwise oil would heat up and burn (coke) around the bearing and cut the turbo bearing life in half.
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06-12-2014, 12:20 AM | #11 |
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I'll just have to go there: it's definitely the worst feature of ANY car. Every bloody time I hear about some new tighter regulations with regards to CO2 and all that rubbish ECO-talks, I just open up good old George Carlin, may his soul RIP, "The Planet is Fine!" - and watch it for the XXth time...
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06-12-2014, 11:28 AM | #12 | |
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I will say that it takes getting used to. I find if I don't pay attention at the stop light and suddenly realize that the light has turned green and try to accelerate quickly it's a pain in the butt. The practice I've adopted is watch the lights, and when the cross-street's light turns yellow a slight lift of pressure from the brake pedal - not enough to cause the vehicle to roll forward - is enough to start the motor so that it's ready 3 seconds later when the light turns green. On the other hand my wife hates it and always turns the feature off.
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Previous: E93 335i, E36 328iC, E28 528e, E21 320i Last edited by ChipB; 06-12-2014 at 11:33 AM.. |
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06-12-2014, 11:46 AM | #13 | |
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08-08-2017, 04:04 PM | #15 |
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yes yes.. its best to turn it off as Default >
http://www.bimmerfest.com/forums/sho...3&postcount=66 |
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08-08-2017, 07:14 PM | #16 |
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I have it coded "off" default on both my cars.
1. If I want a car that turns itself off at stop lights, I'll buy a Prius or Tesla 2. If you're worried about fuel economy, you have the wrong car My 2c
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08-13-2017, 09:14 PM | #18 |
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Who buys a $60,000 plus car and worries about the minuscule gas saving when stopped at a light?
And how dumb was the buttons design to have an orange light "on" when the feature is "off" and visa versa |
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08-13-2017, 09:21 PM | #19 | |
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Eventually think about all cars having this function, all cars stopping at the same time on all red lights, I am not a scientist, but I am sure that would make a difference on pollution/emissions, and the gas savings returning in less gasoline usage.
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08-14-2017, 06:56 AM | #20 | |
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I can travel a 3 mile route to me daughters house and catch 10 lights along the way having to come to complete stop each time "and there is no cross traffic most of the time". But they can't install a sensor to keep light green, if no cross traffic. But they can install money making red light cameras for millions. How much gas does that waste? How much asbestos brake dust has to be scattered into our air with each stop light? Last edited by expidia; 09-01-2017 at 05:04 PM.. |
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08-16-2017, 07:03 AM | #21 | |
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08-16-2017, 09:17 AM | #22 | |
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