Despite its age and mileage, my 88 300E didn't rattle or make any other annoying noises... until recently. There's a fairly loud ticking sound in the passenger side of the dashboard. It never seems to happen in the first 10 minutes of driving following a cold start. Once the car is warmed up, the ticking is usually there, but it sometimes goes away for a while for no apparent reason.

I'm guessing that the climate control servo/flap inside the right side of the dash might be causing this problem, but I'm not sure.

Has anyone else had this problem with their W124? Your input is greatly appreciated.

Thanks,

-Dave M.-