Mine tend to creak and squeak if I don't give them a squirt of PTFE powder spray around the gear area and along the outer rubber seal lip. Available from Halfords in the bike dept. It's used for chains and gear lubrication
Don't use grease / vaseline as these will attract grit and increase wear.
This is def more than a creak, it clicks loudly and folds in jerky start/stop way....Car has MB factory warranty though until december so its going into Mercedes Brooklands for as much as i can think of needs doing!! haha