check your battery for this smell, if it is coming from the battery it's either a cracked battery causing leakage of the acid or a faulty alternator/regulator overcharging the battery and "cooking' the acid into vapor and causing this problem, as you probably know the acid is very coorosive and damaging so check this out asap

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles