Hope I'm in the right section with this ? I have an E30 318is, only had it a few months, and only really just started using it regularly a few weeks ago :D, anyhow, yesterday when I tried to unlock it, manually with the key, (no remote locking on these - not mine anyway) the key will only turn to straight up / down position and wont turn/click further to the right, to unlock ? ! tried the passenger side but that hardly turns at all, this could be because the passenger door lock has hardly ever been used, therfore may be sticking due to lack of use ? ! I eventually managed to fiddle about with the key in the drivers door and managed to get the car unlocked, when I got home, I WD 40'd the visable mechanism of both locks, and locked & unlocked both doors a few times, and all seemed well, BUT :o this morning, it unlocked no probs, but when I got to my usual parking place near my work, I locked it - no probs, thought I'd try unlocking, but it is sticking again !! Why is this ? is it due to lubricant / locks needing cleaned, wear & tear, or could it be the keys ? (I have two keys, and same problem with both) or something else ? !