Electric front windows are sometime tricky. Check for smooth noiseless
movement. Check for perfect closing / sealing of the window when closed.
Check for whistling noise at higher speeds. Best: visible inspection of
inside mechanism, specifically front side where cable is fixed to window
frame. Reason: adjusting the windows is tedious and a new window mechanism
("sorry sir, only the complete unit") costs a fortune. Alternative: live
with it & handle with care.
Cracking noise when steering max left or right are often caused by a design
flaw, regularly put grease on the appropriate locations solves it (not
typically for convertable).
rest: mine is not for sale
W.