When started from cold, my '97 C180 'chugs' for the first minute or so before settling down to a smooth idle. It sounds like it's misfiring and, occasionally, it emits a loud 'click' noise and tries to stall but then catches and returns to the chugging. After about a minute of this it clears and settles to a lovely idle which it then maintains until it is started again from cold. Can anyone help with this as I think it's getting worse as the mornings get colder.....
Thanks,
Helen
Thanks,
Helen
