The class 3 and class 4 tolls on August 16, 2004 were £6.00.
[['16 August 2004', 'CLASS_4_(E.G._VAN)', '£6.00'], ['[TABLECONTEXT]', 'DATE_INTRODUCED', '16 August 2004'], ['[TABLECONTEXT]', '[TITLE]', 'M6 Toll'], ['16 August 2004', 'CLASS_3_(E.G._CAR_WITH_TRAILER)', '£6.00']]