I have just renewed the complete suspension of my dturbo hdi as this is my every day car, the gti for fun. I fitted peugeot shocks 5208 N2 and 5208 N3 to the front N/S and O/S respectively. I noticed the following after picking up from dealer. I am assuming the units are a twin tube design and low pressure gas charged. N3 had label attached 'gas pressure,do not open', sherlock has nothing on me!! N3 behaved normally when the rod was compressed in by hand it self extended slowly as expected. Not so with N2 even after numerous cycles by hand the rod would not self extend or to be precise would only extend approx 1 cm. Both shocks offer equal resistance when compressed and also rebound being pulled out by hand. I also noticed that N2's rod would infact fall in a little albeit slowly after drawing back out. I took the unit back to the dealer and got a replacement which acted in exactly the same way. The dealer assured me all was good and I fitted the units to the car. Over the past week or so,since fitment, something does not feel quite right with the N/S unit-it seems to emit a slight high frequency vibration and feels a little 'crashy' compared to the O/S. The car does track true but vibration is starting to annoy me. Can someone tell me if this is my own unique way of going mad or is something not quite right with the N/s unit. Are these part no.s actually gas charged and what is going on with the difference in behaviour of the two units. All other parts including top mount bearings, wishbones, droplinks and inner and outer tie rods are all new. Front tyres are new and wheels are balanced. Any knowledge here would be greatly appreciated. Thanks