R129 storage, battery and roof issues

Discussion in 'Electronics' started by ABravo, Feb 25, 2016.

  1. ABravo

    ABravo New Member

    Messages:
    20
    Joined:
    Sep 24, 2012
    Location:
    London /hants
    Car:
    W219 CLS 320 C208 CLK 230 convertible r129 SL 320
    hi I am quite :dk:new to the forum and looking for some guidance.
    Tomorrow I will pick up a "new" R129, it will be rarely driven as I have a Cls and clk convertible already. I was going to simply disconnect the battery (as I do with the clk) and leave it in the garage most of the time. ( no power supply to garage) . However I am reading all sorts of horror stories about roofs/windows going out of sync. I am clear I must not jump start it if the battery is flat, now.
    Can you give me any advice. I'm up to
    1) park on drive ( not under cover ) and leave an intelligent charger plugged in
    2) leave it in garage with two batteries in parallel, obviously disconnect before starting
    3) disconnect battery and risk going through whole reset process every time, not too worried about resetting windows but roof sounds less clear.

    I would really welcome your advice on this
    Many thanks in advance
     
  2. Doodle

    Doodle MB Enthusiast

    Messages:
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    May 3, 2005
    Location:
    Echo Beach
    Car:
    R129, Leon Cupra 290, BMW R100
    Leaving it on an intelligent charger would be the best option. I presume from the description above your garage has no power in it?
     
  3. Sp!ke

    Sp!ke Administrator

    Messages:
    12,234
    Joined:
    Jun 2, 2002
    Location:
    West London
    Car:
    SL500 & The Fart Car
    I have a R129 and am in a similar position.

    I have found that with my new Bosch battery, it can last for 3 months in the garage between use and start up just fine. My previous elderly battery would last only 2-3 weeks and then required a booster pack to start the car. (which caused no ill effects I might add).

    I should point out that when in the garage, I do not bother locking the car (which would also enable the alarm). As its a soft top, there seems little point in locking it when in the garage. If someone has broken into the garage, the fabric roof isnt going to stop them getting in anyway.
     
    1 person likes this.
  4. tanuie

    tanuie MB Enthusiast

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    Location:
    Ely Cambridge
    Car:
    E Class AMG 3.5 Coupe
    Same as Spike, i had the battery jump start from a power pack from the AA,
    no after effects at all.
     
  5. ivan1983

    ivan1983 Active Member

    Messages:
    475
    Joined:
    Aug 21, 2012
    Location:
    Middlesex
    Car:
    R129 500SL, W140 S500L, R170 230K, 530i Touring, ZZR 600 W126 380SEL now gone :-(
    I have a battery isolator installed on mine. Its effectively just a switch that disconnect the the negative terminal. Each time I use the car I have to reset the windows which effective resets the roof.

    My car has a tracker which I haven figured out where it is to disconnect so if left it kills the battery reasonably quickly
     
    1 person likes this.
  6. BTB 500

    BTB 500 MB Club Veteran

    Messages:
    18,833
    Joined:
    Aug 7, 2005
    Location:
    Berkshire
    Car:
    R129 SL500, W639 Vito 120, S203 C230
    It's pretty handy having power in the garage (for lights, even if nothing else). Would you be able to get a cable run to it?

    I leave mine on a maintenance charger all the time now.
     
  7. Major774

    Major774 MB Enthusiast

    Messages:
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    Car:
    W211 E55 AMG
    If you can feed some power into your garage then get a CTEK battery charger... This will keep your battery in good shape.
     
  8. aabravo

    aabravo New Member

    Messages:
    21
    Joined:
    May 15, 2014
    Car:
    R129 SL, 320 CLS, 230Clk convertible
    Thank you for all the comments. I am planning on running power to the garage this weekend and leave it on a trickle charger. The slight challenge is the public (but rarely used access path between my garden and garage. (But I have a plan:) )
    I might even get a new battery to be on the safe side, Halfords apparently do a life time guarantee now, which could be useful, if I mistreat the battery. ( they have been good at replacing them in the past)
    I use an isolator on the clk convertible but I think the the minimal use has made it drop some codes, the SRS has come on now. Resetting tomorrow i hope.
    The original plan was to just put an isolator on the SL. Glad to hear those who have done this , have had no real issues. This will be final resort if power supply doesn't work. Thanks again.
     
    Last edited: Feb 26, 2016
  9. aabravo

    aabravo New Member

    Messages:
    21
    Joined:
    May 15, 2014
    Car:
    R129 SL, 320 CLS, 230Clk convertible
    Ivan the window reset is just the holding up and down for 10 seconds and never any issues with roof ?
    Presume roof is left up or hard top on?
    Locked or unlocked. ?
     
    Last edited: Feb 27, 2016
  10. BTB 500

    BTB 500 MB Club Veteran

    Messages:
    18,833
    Joined:
    Aug 7, 2005
    Location:
    Berkshire
    Car:
    R129 SL500, W639 Vito 120, S203 C230
    I mentioned before that I use a maintenance charger (AccuMate in my case) ... the battery in my SL is now over 11 years old, so it has more than paid for itself in that way alone :)
     
  11. ivan1983

    ivan1983 Active Member

    Messages:
    475
    Joined:
    Aug 21, 2012
    Location:
    Middlesex
    Car:
    R129 500SL, W140 S500L, R170 230K, 530i Touring, ZZR 600 W126 380SEL now gone :-(
    Reset is something along the lines of both windows down all the way and hold for 10 seconds and up again.

    I have tried it with both hard top on and soft top but never with the top down and I have the car locked when disconnecting the battery as the windows dont seal properly with power.

    The only other thing you have to do which doesnt affect the roof is rotate the the steering wheel from lock to lock to calibrate the steering angle sensor for the traction control to be happy
     
  12. aabravo

    aabravo New Member

    Messages:
    21
    Joined:
    May 15, 2014
    Car:
    R129 SL, 320 CLS, 230Clk convertible
    Thanks Ivan sounds the same as the clk re steering angle sensor. Really tempted to just put isolator on it like the clk. I assume you lock car,(so windows up) then disconnect battery. Negative terminal.
     
  13. ivan1983

    ivan1983 Active Member

    Messages:
    475
    Joined:
    Aug 21, 2012
    Location:
    Middlesex
    Car:
    R129 500SL, W140 S500L, R170 230K, 530i Touring, ZZR 600 W126 380SEL now gone :-(
    Yep, I open the boot with the key and disconnect the battery to avoid the possibility of locking the keys in the boot
     
  14. aabravo

    aabravo New Member

    Messages:
    21
    Joined:
    May 15, 2014
    Car:
    R129 SL, 320 CLS, 230Clk convertible
    Done it. Isolator fitted. Good as gold now. Eventually will get new battery :)
     
  15. MB-SL500

    MB-SL500 Member

    Messages:
    42
    Joined:
    Mar 7, 2016
    Location:
    NW London
    Car:
    500SL 107 1982
    Many comments above about isolator (trickle charger).
    Can anyone recommend one? Links would be useful.
     
  16. aabravo

    aabravo New Member

    Messages:
    21
    Joined:
    May 15, 2014
    Car:
    R129 SL, 320 CLS, 230Clk convertible
    I use an isolater. Basically a battery kill switch. Works perfectly now
     

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