The sway bar pivot bushings can make a lot of squeaky noise, since bolted to the firewall. Simply spray silicone lubricant thru a straw between the rubber & round bar, which you can do in the wheel wells w/ wheel on.

The rubber bushings at the ends of the sway bar that attach it to the upper control arm were worn in my 85 300D, which made a clunky noise on bumps. Easy, cheap repair.