rear headrest not working
My rear headrest has refused to operate at all and won't come down when I touch the switch on the console. The rear vacuum unit buzzes at a regular interval for about 5 minutes everytime the engine is started. Its a nerve wrecking buzz for backseat passengers who always ask what is that noise? It could be a leak, but no one knows where it is failing. One tech said, its easy, let me replace it for A$1200, but I have been told that the leak is somewhere in the car and you will continue to have the buzz until the leak is sealed or the hoses changed. The vacc unit is not faulty, only going beyond its normal capacity to generate enough vacuum for the door locks , etc. Has anyone else got any other theories?