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W204 Heated seats overheating/fire risk

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Don Byrne, Nov 19, 2020.

  1. Don Byrne

    Don Byrne New Member

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    Hi I have a 2014 w204 c class. Today I felt excessive heat on the back portion of the seat to the point of it being burning . I turned off the heating on the seat and noticed that there was a small smudge on the leather in the region of this “overheating” and got the whiff of something burning but no smoke.. I’m wondering has anyone come across this before. I assume it involves seat out and possible repair to element or associated electrics.
     
  2. Uncle Benz

    Uncle Benz Senior Member

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    I've only ever seen it once before, on a BMW 6 series. A short circuit in the heating pad had led to a very localised overheating. It actually burned a small hole through the leather on that car. Not common at all, but potentially dangerous, as you imply.
     
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  3. EmilysDad

    EmilysDad Senior Member

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    I've seen it on a Vauxhall too ..... similar result. Kneeling on the seat to reach over the car doesn't help!
     
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  4. sonic

    sonic Senior Member

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    Never had a problem with numerous MB's all had heated seats.
     
  5. onefortheroad

    onefortheroad Senior Member

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    Very apt user name .
     
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  6. OP
    Don Byrne

    Don Byrne New Member

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    o_O unfortunate irony under the circumstances...
     
  7. OP
    Don Byrne

    Don Byrne New Member

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    Not so much kneeling on it. Have a bad back so use it only on cold mornings or if the back is acting up and need a boost of heat into it.
     
  8. EmilysDad

    EmilysDad Senior Member

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    I meant that kneeling on the seats can damage the heating element ... ;)
     
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  9. Gazwould

    Gazwould Senior Member

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    There's only one nocturnal activity I can think of that has damaged that in that way...
     
  10. M80

    M80 Senior Member

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    Not unknown

    burning seat heater - Google Search
    and I'm sure there will be more.

    In your case I would be looking for a 2nd hand replacement on eBay. An issue there can be being sure the seat is heated as not all sellers give an accurate description, but you have 30 days to raise a case.

    Meanwhile settings 2 and 3 apply a lower voltage to the heater so is far less likely to give you hot pants.
     
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  11. OP
    Don Byrne

    Don Byrne New Member

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    offending areas circled in red
     

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  12. OP
    Don Byrne

    Don Byrne New Member

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    Will let forum know outcome. Booked into local MB dealer Monday
     
  13. Blobcat

    Blobcat Moderator

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    I didn't think the heater was in the bolsters, just in the main back section
     
  14. EmilysDad

    EmilysDad Senior Member

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    The dealer will want to sell you a seat cover at £££££££££££££££££££££££££££££s after they've charged you a diagnostic fee to tell you that your seat heater element is goosed! :rolleyes:
     
  15. BillyBoy

    BillyBoy Senior Member

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    Agreed - I wonder if it has be pushed out of position at some point (maybe by a previous owner?) and that's what's damaged the element?
     
  16. 00slk

    00slk Senior Member

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    Heated seat cover's aren't too badly priced at MB around £600 per cover, actually that sounds a alot :rolleyes: but you do get brand new leather with a sewn in element :D So £2400 for the front seats.......:shock:
    That really didn't help you did it :oops:
     
  17. EmilysDad

    EmilysDad Senior Member

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    How much?!?!
    I'd expect to be able to buy a road going car for £2400! ;)
     
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  18. 00slk

    00slk Senior Member

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    That price is for an SL55, I would be expecting a cheaper price for saloon or even the SL500. AMG for some reason commands higher prices :rolleyes:
    I can remember paying £205 for w124 estates in 2006 :D
     

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