Hmm..... I'd be using it in a '95 323i which is probably about the same as your 528i. You wouldn't happen to have a photo, would you ? But to be fair, it's got to be a better match than blue :-)

Steve.
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Mk2a 10+40Gb Darkstorm Neon Red Nakamichi CD45z, Genesis Five Channel, Genesis A16s, JL 8W6 x3