Good afternoon all. Hope you can help. I have just purchased a 2001 156 1.6litre petrol from a local garage. 41K on the clock. Within a day it has strarted making a strange mechanical noise when starting from cold. This stops after a couple of seconds. Otherwise it sounds great when running. Aircon appears not to cool at all - could this noise be something to do with the compressor or something more sinister. Have to confess Garage where I bought it are being zero help and and although it is booked in for a check any guidance I can give them would be great. Also if it is really potentially bad news then I still have the option to return the car. Any thoughts would be most welcome.