Fitting C-TEK connector, is it safe for electronics?

Discussion in 'Electronics' started by noogieman, Sep 13, 2019.

  1. noogieman

    noogieman Hardcore MB Enthusiast

    Messages:
    1,781
    Joined:
    Sep 20, 2005
    Location:
    In the EU
    Car:
    My dream: Der Hammer AMG
    Is it safe to screw a C-TEK battery charger connector onto the POS - NEG terminals inside the black box in the engine bay which is highlighted in the photo?
    This box is used to jump start cars with dead battery.

    I have fitted the same C-TEK connector to my bat in the trunk, depending how I park my car in the garage I would like to charge my bat either from the front or the rear.

    Did anyone fit this connector in the engine room?
    I don't want to fry any electronics so my Q is?
    Is it safe to charge the battery from the engine bay?
     

    Attached Files:

  2. skippyjasper

    skippyjasper Hardcore MB Enthusiast

    Messages:
    122
    Joined:
    Feb 17, 2014
    On my ML I only use the terminals under the hood for charging. The battery is well hidden under the passenger seat.
    I use a CTEK as well.


    Sent from my iPad using Tapatalk
     
  3. Atavus

    Atavus Hardcore MB Enthusiast

    Messages:
    139
    Joined:
    Jun 8, 2019
    Location:
    Berkshire
    Car:
    S63 AMG Coupe
    Charging under there is also the standard method on my car. I just use the crocodile clips, but permanent attachment is quite safe. Pretty well anything with stop/start will have a place like that to attach a charger. It’s so the BMS will see any current to the AGM battery.
     
  4. OP
    OP
    noogieman

    noogieman Hardcore MB Enthusiast

    Messages:
    1,781
    Joined:
    Sep 20, 2005
    Location:
    In the EU
    Car:
    My dream: Der Hammer AMG
    Black box with POS/NEG terminals is considered as a convenient extension of the battery in trunk for jump starting dead cars?
    Must be perfectly safe to connect the C-TEK eyelet connector to pos/neg terminals to charge battery from the engine.

    It's very handy if you park your car in different directions in the garage having battery connectors in each end.
     
    Last edited: Sep 14, 2019
  5. bob6600

    bob6600 MB Club Veteran

    Messages:
    5,447
    Joined:
    Jan 3, 2013
    Car:
    AUDI S8 V10, S210 E320 CDI (R.I.P.)
    On my W210 I connected the CKEK via the eyelets provided and ran an extension (CTEK) into the boot.
     
  6. OP
    OP
    noogieman

    noogieman Hardcore MB Enthusiast

    Messages:
    1,781
    Joined:
    Sep 20, 2005
    Location:
    In the EU
    Car:
    My dream: Der Hammer AMG
    That's what I have for now.
     
  7. Atavus

    Atavus Hardcore MB Enthusiast

    Messages:
    139
    Joined:
    Jun 8, 2019
    Location:
    Berkshire
    Car:
    S63 AMG Coupe
    I expect the 210 pre-dates AGM batteries. It’s important to avoid connecting the charger to the battery terminals on those.
     
  8. ToeKnee

    ToeKnee Hardcore MB Enthusiast

    Messages:
    461
    Joined:
    Aug 14, 2016
    Location:
    leicestershire
    Car:
    R230 SL500 in teal blue, R231 SL500 in black. Vauxhall insignia diesel
    Why?
     
  9. Rorywquin

    Rorywquin Hardcore MB Enthusiast

    Messages:
    1,833
    Joined:
    Nov 14, 2016
    Location:
    God's County
    Car:
    SL400
    Wouldn't it be simpler to park the in the "right" direction when you want to charge the battery?
     
  10. OP
    OP
    noogieman

    noogieman Hardcore MB Enthusiast

    Messages:
    1,781
    Joined:
    Sep 20, 2005
    Location:
    In the EU
    Car:
    My dream: Der Hammer AMG
    I'm not the only one in my garage.
    Depending how the other tenants park their cars I need to have Eyelets in each end for easy access to power connection.
     
    Rorywquin likes this.
  11. Atavus

    Atavus Hardcore MB Enthusiast

    Messages:
    139
    Joined:
    Jun 8, 2019
    Location:
    Berkshire
    Car:
    S63 AMG Coupe
    See #3 above
     
  12. bob6600

    bob6600 MB Club Veteran

    Messages:
    5,447
    Joined:
    Jan 3, 2013
    Car:
    AUDI S8 V10, S210 E320 CDI (R.I.P.)
    I'm sure some models of CTEK have an AGM mode?
     
  13. AMGeed

    AMGeed MB Club Veteran

    Messages:
    11,994
    Joined:
    Nov 1, 2008
    Location:
    Bournemouth/Poole Dorset
    Car:
    2014 E63 Biturbo
    I connected my eyelets direct to the main battery in the boot on my E55 and left it on for 24hrs.
    Seemed OK when I discoonected the charger and started up.

    Just need to find the best point inside the boot on a W212 now.
    I assume with start stop which will be disabled there is a 2nd battery in the boot and the eyelets connect to the AGM main battery.
    The MX5S does have the AGM function.
     
  14. OP
    OP
    noogieman

    noogieman Hardcore MB Enthusiast

    Messages:
    1,781
    Joined:
    Sep 20, 2005
    Location:
    In the EU
    Car:
    My dream: Der Hammer AMG
    C-TEK charge 80% in 24 hours, the rest of 20% takes approx 10 days to fully load the battery, something to think about when you let your car sit for a long time over winter.
     
    E55BOF and AMGeed like this.
  15. ToeKnee

    ToeKnee Hardcore MB Enthusiast

    Messages:
    461
    Joined:
    Aug 14, 2016
    Location:
    leicestershire
    Car:
    R230 SL500 in teal blue, R231 SL500 in black. Vauxhall insignia diesel
    Ok not trying to be confrontational but would the bms see anything with the ignition off and all systems asleep? Genuinely curious as c-tek do suggest to connect direct to battery?
     
  16. Atavus

    Atavus Hardcore MB Enthusiast

    Messages:
    139
    Joined:
    Jun 8, 2019
    Location:
    Berkshire
    Car:
    S63 AMG Coupe
    CTEK give that general suggestion. Many manufacturers say otherwise for their cars in the manual. The BMS certainly tracks power in and out. Some cars need coding in the car when the battery is being replaced, for the same reasons.
     
    ToeKnee likes this.
  17. OP
    OP
    noogieman

    noogieman Hardcore MB Enthusiast

    Messages:
    1,781
    Joined:
    Sep 20, 2005
    Location:
    In the EU
    Car:
    My dream: Der Hammer AMG
    Took a photo today.
    Mechanic told me it's all good charging battery from the engine bay although battery is located in the boot.
     

    Attached Files:

  18. AMGeed

    AMGeed MB Club Veteran

    Messages:
    11,994
    Joined:
    Nov 1, 2008
    Location:
    Bournemouth/Poole Dorset
    Car:
    2014 E63 Biturbo
    Has anyone with a W212 fitted the fly lead in the engine bay?
    I can see the + and - points but neither will accept the circular ring that is on the end of the Ctek lead?
     
  19. 190

    190 Hardcore MB Enthusiast

    Messages:
    2,758
    Joined:
    Mar 4, 2015
    Location:
    Cheshire
    Car:
    2009 W204 C180K
    The owners manual should specify a safe maximum charging voltage in terms of potential damage to the cars electronics. Mine states that the charger output must not exceed 14.8 volts. Some chargers with a desulphation mode may exceed the safe voltage in which case the battery should be disconnected before charging.
     
  20. Stratman

    Stratman Hardcore MB Enthusiast

    Messages:
    4,566
    Joined:
    Jun 15, 2003
    Location:
    Sunbury
    Car:
    W203 C200 CDI '04Estate
    Go to Halfords and buy some connectors that will fit, and replace the C-Tek ones with them.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.