Just got my B8 2008 120bhp 2 weeks ago, my first diesel. Drove 10 min to shops yesterday evening 8pm, no delays in traffic, easy drive. when walking away after locking I heard a fan kick in under bonnet. Drove home an hour later, no instrument warning showing all appeared ok. Two hours later went to get something from the car and heard a sort of of Popping noise (distinctive popping) from under the bonnet like air or fluid expelling bubbles type sound. AFTER I opened the bonnet I heard a noise that sounded like a Servo or Purge motor running for about 10 seconds around the front passenger side of the engine compartment (key not in ignition). Checked but no signs of any leaks etc. Drove to work and home today and no problems. Only 60k on clock Should I be worried?