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Matt
Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 22258
Experience:  BEng hons Mech engineering, in auto industry 22 years
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the horn on my ml 270 cdi has stopped working ?

Resolved Question:

the horn on my ml 270 cdi has stopped working ?
Submitted: 3 years ago.
Category: Mercedes
Expert:  Shantal-Mod replied 3 years ago.
Hello,

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Shantal
Expert:  Matt replied 3 years ago.
eHello

1st thing to check is if the horn fuse in the underdash box is blown or not - if it has then try a fresh one


if that doesn't help then locate the horn unit / siren which should be in front of the radiator behind the front bumper - check its connections are clean with no corrosion then try putting a fresh 12V wire direct from the battery to its poistive terminal to see if it works or not as they can fail from internal corrsoion
Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 22258
Experience: BEng hons Mech engineering, in auto industry 22 years
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