I bought a 1998 m320. The headlights are not adjusted corrrectly. The adjustment screws wont turn and I am afraid of breaking them. Any suggestions on how to loosen them without breaking them? The headlights are not shining evenly on the garage door, theleft one shines about 1 foot higher than theright one (I am guessingdirectlyinto the eyes of oncoming traffic). Any suggestions would be appreciated. Thanks, Bob