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stop start technology

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by AKS123, Dec 24, 2012.

  1. AKS123

    AKS123 New Registration

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    Your Mercedes:
    e250/2012/2200
    Does anyone know all the conditions that have to be fulfilled before the ECO light goes green - new E250 CDI
     
  2. whitenemesis

    whitenemesis Senior Member

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    Your Mercedes:
    CLS55 AMG '05
    It's all in the owner's handbook..

    "The ECO start/stop function is operational and the symbol is displayed in green in the multifunction display, if:
    • the indicator lamp in the ECO button is lit green.
    • the vehicle is stationary.
    • the outside temperature is within the comfort range.
    • the engine is at normal operating temperature.
    • the set temperature for the vehicle interior has been reached.
    • the battery is sufficiently charged.
    • the system detects that the windscreen is not misted up when the air-conditioning system is switched on.
    • the bonnet is closed.
    • the driver's door is closed and the driver's seat belt is fastened.
    If conditions for automatic engine switch-off have not been fulfilled, the symbol will be shown in yellow."
     
  3. EmilysDad

    EmilysDad Senior Member

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    Your Mercedes:
    ML350
    what about auto's? Obviously no clutch to dip to 'wake up' the engine? :confused:

    Not that I'd ever want a stop/start car (the stop/start courtesy B Class was bad enough) ;)
     
  4. teabag

    teabag Senior Member

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    Your Mercedes:
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    It fires up as soon as you touch the throttle pedal or lift your foot off the footbrake.

    Funnily enough I thought it would take some getting used to and remain switched off, but once you get the hang of it, it's quite easy.

    One thing I would worry about would be the cost of replacement starter motors and ring gear if I were to keep it after the warranty period, I can imagine the life of these must be reduced drastically if the car is mainly used in heavy traffic.
     
  5. Rotorhead500

    Rotorhead500 Senior Member

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    Your Mercedes:
    Used to have a C63...
    As laudable as the intent of stop/start systems is, I personally dislike the system... a lot!

    Now on my second car with it and the first thing I do upon starting the car is switch it off!

    I queried the robustness/longevity of the starter motor when I bought a BMW with it on - "Oh no Sir, no need to worry - its been engineered and tested with this in mind!" Within 3 months from new, and a couple of momentary hiccups beforehand, the car refused to start at traffic lights one afternoon.

    That was on a -57 reg, things may well have been beefed up a bit since then, but.....
     
  6. EmilysDad

    EmilysDad Senior Member

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    Still not sold on the idea :neutral: I can fore see fun and games in years to come when it doesn't start when you're about to do a hill start/etc According to a neighbour (works in the garage at a main dealer) some cars use the alternator to help the engine spin over :confused::confused::confused:
     
  7. PeterCLK

    PeterCLK Senior Member

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    Your Mercedes:
    2012 204 Elegance saloon 220 cdi
    Mine works fine as WN describes.
    Good point about the starter motor.
     
  8. television

    television Always remembered RIP

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    Your Mercedes:
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    I did not like it on the loan car I had. The starters are very different for these, there is a very good description in WIS, and I will try and find it again. :D
     
  9. daveyjp

    daveyjp Senior Member

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    The starting system for the stop start isn't the starter motor. It uses the alternator.
     
  10. teabag

    teabag Senior Member

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    I'll have to remember this when the belt starts to slip as I'm sure it will given the extra strain of starting a diesel engine.
     
  11. EmilysDad

    EmilysDad Senior Member

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    Just press the over ride button. How long will it take to save the £20-odd for a new 'fan belt'? :rolleyes: :rolleyes: :rolleyes:
     
  12. ctech

    ctech Guest

    i have been having issues with my stop start system on my 2010 w169( i think it should be renamed start and wont stop)as the car is running and up to temp and the system doesn't cut in at all i.e. no light on dash this happened for a whole day 5.20 am then on the return journey at 3pm it was a few degrees above in the morning so not cold i then booked car in at MB next day it was ok but then it became every few days it would play up, yesterday i got my car back from MB no faults found but what they did say is the system has to meet certain conditions but couldn't tell me exactly what ,so today i rang mercedes h/o in Milton Keynes i asked them the question about the conditions they said to look in the manual so they didn't give me any conclusive answers, the point i dont understand is " the outside temperature is within the comfort range." what is the comfort range does it have to be in double figures for the system to be operational or is plus temperatures ok ???

    if i knew when the system doesn't work then i wouldn't be thinking something was wrong with it again, the other one is "the battery is sufficiently charged" i asked MB h/o how can you tell if the battery has sufficient charge they told me you have to measure the voltage when it happens again what voltage is classed as being too low ???

    this has to be the worst car i have had ,only bought it end feb 2012 and i have had the following go wrong with it
    1) ignition key,2) serpentine belt, 3) drivers seat belt, 4) passenger seat belt
    5) water leak in boot.
     
  13. turbopete

    turbopete Senior Member

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    how can the ALTERNATOR start the car? it will need the starter to turn the engine over, surely?
     
    Last edited: Feb 28, 2013
  14. ctech

    ctech Guest

    on the drive belt there is a starter generator when the engine stops there is a charge of fuel in the cylinders so all you need is to spin the engine to start it again this is what the starter generator does
     

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