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1990 928S4 Option codes


Model: 928S4, Year:1990, Mileage:33,900, Type of use:Street use only
Hello. I'm trying to identify all the option codes on my 1990 928S4 that are listed on the sticker under the carpet under the rear hatch. I've googled several 928 websites and found 928 option code lists explaining all the option codes on my car except 458 and 588. Can anyone please tell me what these two codes are? Thank you in advance. John Doak in Baltimore, MD

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