Residual Heat function in GLC X253 / C W205

Discussion in 'Electronics' started by richard, Dec 20, 2016.

  1. richard

    richard Authorised Forum Sponsor Authorised Forum Sponsor

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    Mercedes used to always have a residual heat function where the coolant could keep being pumped through the heater matrix when the car was off.
    This meant you could run the heating in the car for a long time with the engine off, great when waiting for someone (like the kids).
    They they then seemed to only include the function if you had the advanced air-conditioning system.

    BUT, sadly you can't order that on the new GLC in the UK, (and I assume the C class).

    Luckily, I worked out it can be retrofitted relatively easily to even those with basic air-conditioning - if the car is new enough and is diesel as them some of the parts are there. (If its not diesel, it can still be done, but a significant job)

    So, now I have residual heat function, and 'REST' written on one of the buttons on my air-con switches.

    I'm quite pleased with that as I hate leaving engines running polluting the area where I'm waiting for the kids !!!!

    Richard
     
  2. whitenemesis

    whitenemesis MB Club Veteran

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    One of the 'luxuries' of the hybrid system, everything remains active and on, with no engine running, well, until the traction battery runs low but then that's the same as the Merc way, just lasts a lot longer! ;)
     
  3. OP
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    richard

    richard Authorised Forum Sponsor Authorised Forum Sponsor

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    I can't believe you've sold the CLS55 !!!
     
  4. whitenemesis

    whitenemesis MB Club Veteran

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    I miss that awesome engine but not much else TBH

    Lexus is very different and hybrid with eCVT even more so! Smooooth then select Sport mode and get 6 'gears' clever...
     
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    richard

    richard Authorised Forum Sponsor Authorised Forum Sponsor

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    I discovered another use of Residual Heat - if just popping out of car for 30 mins or so (hair cut for instance) you come back to a warm car :)

    Very happy now

    R
     
    Bobby Dazzler likes this.
  6. whitenemesis

    whitenemesis MB Club Veteran

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    But do you find it increases the humidity level in the car? Misty windows? As the a/c isn't functioning, at least it wasn't in the CLS
     
  7. OP
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    richard

    richard Authorised Forum Sponsor Authorised Forum Sponsor

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    Yup, but it clears in 20 seconds when I restart later. And warm car when coming back is worth every penny as I hate the cold.

    R
     
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  8. Teckno

    Teckno New Member

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    Hi Richard,
    I'm from Australia, with a 250d.
    Can you send info or explain how you achieved this.
    Many thanks
     
  9. OP
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    richard

    richard Authorised Forum Sponsor Authorised Forum Sponsor

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    Use the contact form on sales@comandonline.co.uk and give us your VIN and ask Alfie to send message to me, and we'll sort you out the parts etc
    R
     

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