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      03-13-2021, 02:08 AM   #5
belcom
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Drives: '18 540i, '06 Z4si, '07 Z4MC
Join Date: Nov 2014
Location: Toronto

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i've got something similar going on with mine. keep your trickle charger connected and press the top down button and hold it for a long time. until you hear the hydraulic fluid rushing through the system and doing something. do it a few times if necessary. eventually it will restore its normal operation. at least that's how it worked with mine. previous owner changed the motor so in my case I also knew it was not a failed motor and exact same symptoms as yours. the hydraulic system is self bleeding and I suppose needs some persistence.
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