I can see you have problem with CV joint (grinding noise) in another thread. We have to know the maintenance history of the car to give better suggestions. In the US, the major service intervals are 30/60/90/120K miles. Your mileage at 169,000 Km is @ 100K miles which is somewhere between major service intervals.
If you don't have a maintenance history of the car, you might as well replace/flush all the fluids. If the suspension and spark plugs are original, then they are due for replacement. Check your brake pads and rotors as well as the condition of brake fluid, brake lines, etc. You can refer to the link below regarding Maintenance Schedule, starting on page MA-6.
http://www.nicoclub.com/FSM/i35/2003/ma.pdf