It might be good to know if there is a specific fuse that can be pulled as a workaround (e.g. to stop the flow if reservoir was not emptied yet and, more importantly, to stop the pump from running continuously until the vehicle could be taken to the dealer for service). Maybe someone knows...

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2013 x35i (Space Gray, MSport, CW/CWII, DHP, Premium, Premium Sound, Technology, BMW-Apps)
Retired:'09 C300 4Matic, '09 GTI, '06 750i, '05 C55, '04 R32, '03 M5, '02 GTI, 01 M5, '00 M-Coupe, '00 540i/6, '99 M3 Coupe, '98 M3 Coupe, '96 328i, ..., '86 4000CS Quattro, ... too many to list