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exhaust welding w203

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by gregdtx, Oct 24, 2012.

  1. gregdtx

    gregdtx Senior Member

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    lancashire
    Your Mercedes:
    c220 cdi saloon elegance 2004 vito dualiner 115 cdi 2004 clk convertable 200 sport
    my exhaust bracket needs a small weld on it on previous cars i would have just diconnected the battery and done the weld however i believe this is not possible on the merc do i need to remove the exhaust thanks in advance
     
  2. Naraic

    Naraic Moderator

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    Your Mercedes:
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    I've welded on my car...battery disconnected.
     
  3. OP
    gregdtx

    gregdtx Senior Member

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    Your Mercedes:
    c220 cdi saloon elegance 2004 vito dualiner 115 cdi 2004 clk convertable 200 sport
    i thought you were not supposed to disconect the power supply on the w203
     
    Last edited: Oct 24, 2012
  4. Cole@MBS

    Cole@MBS Forum Supporter Authorised Forum Supporter

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    124 300 CE 24 Coupe, 209 240 CLK
    I never bother, just have the earth close to the welding point.......
     
  5. OP
    gregdtx

    gregdtx Senior Member

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    Your Mercedes:
    c220 cdi saloon elegance 2004 vito dualiner 115 cdi 2004 clk convertable 200 sport
    so your saying no need to disconect the battery just earth from the exhaust
     
  6. cleverdicky

    cleverdicky Senior Member

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    I would pull the plug from the back of the alternator also.
    You are supposed to disconnect battery, if you do, remove fat red wire from rear sam before reconnecting. Electronics are sensitive. Keep the key away from ignition at the very least.
    That sad I have welded cars after 'forgetting' to disconnect battery, but never on my MB.
    If only a small weld on exhaust, which is mostly insulated anyway, do as Cole says and clamp close to weld area.
     
    Last edited: Oct 24, 2012
  7. Benzworx

    Benzworx Senior Member

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    CLK 55 amg
    same as Cole just weld in situ no need to disconect
     
  8. Frontstep

    Frontstep Senior Member

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    I thought the battery helps protect from spikes but I admit my knowledge is limited or old that was with a Mig.
    Just put earth near to job as said.
     

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