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Re: 528Wagon A/C Problems
bmw used several different IHK systems in E34's. if you've check ALL the fuses in the front E-box, sadly and while that little switch block might be bad, the most likely cause is a failed control unit [located between the heater box and firewall] you need to pull out the glovebox, consoled side cover[carpeted] and the air duct [3 phillips screws]...it simply sides out and unplugs.
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