PPAB FINAL 2/4/98 ASSET PURCHASE AGREEMENT by and among SONIC AUTOMOTIVE, INC. HATFIELD JEEP EAGLE, INC. HATFIELD LINCOLN MERCURY, INC. TRADER BUD'S WESTSIDE DODGE, INC. TOYOTA WEST, INC. HATFIELD HYUNDAI, INC. BUD C. HATFIELD DAN E. HATFIELD