Finally picking up the C55 tomorrow (yay!) and have one minor technical question already! The electric front headrests stick, though they will move with a little firm "help" from your hand. I imagine it's probably not something that's moved very often in its life and is possibly just a bit in need of some lubrication. I have a sillicon lubrication spray (works a dream on sticky retracting aerials!) and my first inclination is to try that. Any danger it will eat/disagree with any of the materials/seals inside the mechanism!?