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R230 Consumer Battery

Discussion in 'General Mercedes-Benz Related Discussion' started by nicholas15, Jan 11, 2019.

  1. nicholas15

    nicholas15 Senior Member

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    near Ashford, Kent
    Your Mercedes:
    s class w221 - 2012 350 Bluetec, SL500 r230 2003
    Following advise here, I having invested in a CTEK charger for use on 2003 SL500.
    My question now, is can I charge the consumer battery via the cigarette lighter or only via the terminals on the battery in the boot?
    I presume it is an AGM battery?
     
  2. ajlsl600

    ajlsl600 Senior Member

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    Location:
    france
    Your Mercedes:
    clk3202001,sl6002003 with everything,A class 170cdi auto
    i just connected up the plug end cables to the batt and leave the lead poking out into the boot,i find that once conected its still no issue to close the boot. agm it tis. i also keep a ctek on the front batt ,tho i rotate that on SL,CLK dont know about fag lighter as input, someone surely will, seems best to me to involve going thru as little as possible to charge consumer batt .rules out ANY dramas
     
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  3. LostKiwi

    LostKiwi Senior Member

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    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Only via the battery terminals.
    Easiest way is to put a fixed fly lead on the battery and use that to connect the battery. The CTEK usually comes with a flylead with eyelets that will do the job. Yes it's an AGM battery.
     
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  4. McDonald

    McDonald Senior Member

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    Your Mercedes:
    SL500 2004
    While my car is resting I use a Ctec battery conditioner on the consumer battery, but not on the starter battery. Am I just lucky that the car starts immediately every time?
     
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  5. LostKiwi

    LostKiwi Senior Member

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    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Never had to charge the starter battery on ours. The consumer battery goes flat for fun though....
     
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  6. ajlsl600

    ajlsl600 Senior Member

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    Your Mercedes:
    clk3202001,sl6002003 with everything,A class 170cdi auto

    my start batt went dead a few yr ago, it was 10. since no issue i just prefer to rotate the ctek now and then. mine spends 4 /5 months in its cot.
     
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  7. Denis O

    Denis O Senior Member

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    I have a fly lead attached to both starter and consumer batteries in my 350. Most of the time the C-Tek is on the consumer but every now and again I give the starter battery a quick shot. It certainly won't do it any harm even if it doesn't need it.
     
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  8. OP
    nicholas15

    nicholas15 Senior Member

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    Your Mercedes:
    s class w221 - 2012 350 Bluetec, SL500 r230 2003
    Thanks. The consumer battery has eyelets attached from the previous owner so will use those.Thought I ought to do something because I will be in New Zealand over next couple of months

    Also thanks to others for their comments.
     
  9. LostKiwi

    LostKiwi Senior Member

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    Excellent! Which part of the country are you going to?
     
  10. OP
    nicholas15

    nicholas15 Senior Member

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    Location:
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    Your Mercedes:
    s class w221 - 2012 350 Bluetec, SL500 r230 2003
    Typical tourist; fly into Auckland, hire a car, then Paihai, Stratford, (Forgotten Highway), Cambridge, Rotorua, Wellington, then bus for South Island, Christchurch, Trans Alpine, Fran Josef, Queenstown, Christchurch, Auckland
    Guess much of that is familiar to you!
     
  11. 00slk

    00slk Senior Member

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    Your Mercedes:
    2002 SL55 AMG, 2003 SL500
    Yep, been to all those places ;)
    We just leave our car batteries connected when we go overseas, longest time left was 3 months and haven't had any flat battery issues. Hope I haven't said anything, I don't want any bad omens :eek:
     
  12. LostKiwi

    LostKiwi Senior Member

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