I have a 2002 C240 and for the past few weeks (not sure if it's because of the cold weather) it has been clicking rythmically every 5 seconds for approximately a minute after I turn the ignition. It is almost like it's behind the middle console or under the gear shifter or something. I think it may have something to do with the A/C because if the A/C is on in the first minute, it blows a blast of air every time it clicks. It is sooo annoying, but I'm afraid there is a bigger problem. Has anyone experienced anything like this or have any suggestions on what the problem might be? Thanks!