The burning smell could potentially be the clutch plate burning out. This will smell until it is replaced
It could also be a case the release bearing on the clutch is sticking causing the drive and clutch plate to not fully disengage when you release the clutch pedal therefore slowly wearing in the flywheel.
Unfortunately this is not something you can fully diagnose until you strip the bell housing and gearbox out to have a look
It is possible when the car was designed and the release bearing was put in there wasnt enough clearance put from the release bearing and the clutch plate diaphragm.
If I was you id ask peugeot to change the full clutch and not just the fluid before it goes out of warranty
Hope this helps
Monday, January 11th, 2010 AT 11:32 AM