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Battery draining

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by ady74, Nov 23, 2012.

  1. ady74

    ady74 Senior Member

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    E270 E230 Vito
    Hi i have a 2001 s320 and after 3 days of not using it the battery is always dead and i have get the battery pack out to jump it :mad:
    Is there a easy way to find out whats draining it myself or am i going to have to take it some where?
    Cheers
     
  2. davidsw

    davidsw Senior Member

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    Jaguar XKR ,Jaguar S-Type, Porsche Boxster S
  3. OP
    ady74

    ady74 Senior Member

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    ok great is it easy to use what do i do with it never used one?
     
  4. davidsw

    davidsw Senior Member

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    you take out each fuse in turn , plug in the unit and it tells you if there is any current drain and how much.You could do this at the battery witjh a normal volt meter , but this unit will pin point where the problem is .Don't foget even with ignition off there is some small drain on the battery Clock ,Alarm etc.
    How old is the battery ? The cold weather will catch out batteries that are on their way out .
     
    Last edited: Nov 23, 2012
  5. OP
    ady74

    ady74 Senior Member

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    ok great sounds easy enough with this unit ill try one for 15quid. battery is new in january but this car as always had this problem since i bought it in january just that i dont use this car as much now so getting on my nerves keep going out every few days to start it.
    PS what should the unit read for good and bad?
    cheers
     
    Last edited: Nov 23, 2012
  6. giuseppe

    giuseppe Senior Member

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    Your Mercedes:
    E220Cdi avantgaurde 2001
    is it a mecedes battery, if not , you will always get problems.
     
  7. Silver_Star

    Silver_Star Senior Member

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    How does that work then? :confused:

    There will be 1000's of cars on the road with non MB batteries without issue.

    If there is a drain on the battery, it will drain the battery whoever made it.
     
  8. giuseppe

    giuseppe Senior Member

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    with all the electric gizmos mercedes have, any low voltage or current seems to cause hassle
     
  9. Silver_Star

    Silver_Star Senior Member

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    I know, the battery is often neglected area of maintenance. Under voltage can cause all sorts of issues. However MB do not make batteries. I have a Unipart on mine which cost about £75 for a 100Ah one. It has been installed over 4 years and no issues.

    Next time I will get a Bosh or Exide if ECP still have their deals on. The fact is the car has a drain which will be present whichever make of battery is fitted.
     
  10. OP
    ady74

    ady74 Senior Member

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    Mine is a bosch cost £140 so not a cheap one, yes a lots of gismos on the s class i think its just something draining it i just need to find out what it is,thats the tricky part. im going to buy one of them volt meters that davidsw recomended.
     
    Last edited: Nov 23, 2012
  11. BAZZER1

    BAZZER1 Senior Member

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    Your Mercedes:
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    Get the right Bosch Battery for your make of car and you should have no more problems, I had a similar problem and although the Battery was relatively new, I decided to buy a Bosch 100amp, correct cranking and in my case for an air condition vehicle and no more problems.
    It is extremely important that you look at the new Battery spec and ensure that it is correct for your vehicle
    Hope all goes well
    Best regards
    BAZZER1
     
  12. harley03joe

    harley03joe Guest

    Why Don't You Do Like I Do, Use A Battery Tender :)
    Harley03joe

    [​IMG]
     
    Last edited by a moderator: Mar 3, 2013

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