That's not a M package car, that's a sport package car. From what i know, no 4-door 328 in 98 came with an M package (some 2doors did, with M mouldings/bumpers/motorsport inserts)
the 98 328i port package cars came with an M wheel.
Car looks great.
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Hot: 2001 Estoril M Roadster
ZCP 19's michelin supersports, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt ZCP 19's michelin supersports, deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 18's w310's,
fun: 2006 YZF-R6, black