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554 Views 11 Replies 3 Participants Last post by  Paul600600
I just bought a w209 convertible and i replaced the fog lights with led lights.
but they will not come on and stay on when you set the switch to them.
They only flash for a few seconds like Christmas tree lights do. What could be the problem? Or can i just wire them to the headlights for them to work?
1 - 1 of 12 Posts
Your car runs a CANBUS system ,,which monitors resistance on all circuits..your new led's have different resistance to the original bulbs.
If you replace any front lights such as Park lights or fog lights ,,you need to use CANBUS Error free / compatible led's.
or add a resistor as mentioned above ,,
it is usually easier to buy 'error free ' bulbs .
1 - 1 of 12 Posts
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