Tony,
If it does this when a traffic report comes in, this is correct operation if you have the TP function activated. If it does is at random, it sounds like a fault.
Turn off the traffic function (TP) to check.
Your vehicle also has steering column mounted remote controls for the audio. It's worth checking those for some malfunction.
Saloon versions of the 406 suffered water ingress to the remote changer (from leaking rear lamp clusters). All sorts of bizarre faults from that one...Not applicable to the Estates.
Best of luck.
Edited by dereckr on 16/05/2011 at 22:50
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