I needed a change as regards steering wheel so decided to fit a Z4 E85 steering wheel to my Z3 facelift. 
Bought a Z4 steering wheel with MFSW buttons + paddles(!)
		
			
		
		 
	
Νeeded some machining to fit the E39 slip ring (7 cables to use extra cable for light of buttons)
Soldered facelift slipring plugs for car and airbag side and a 4 pin female plug to connect to 4 pin MFSW buttons
All went as planned and voila! Illumination of buttons works, horn also works and indicators canceling works as should.
		
			
		
		 
	
								Bought a Z4 steering wheel with MFSW buttons + paddles(!)
Νeeded some machining to fit the E39 slip ring (7 cables to use extra cable for light of buttons)
Soldered facelift slipring plugs for car and airbag side and a 4 pin female plug to connect to 4 pin MFSW buttons
All went as planned and voila! Illumination of buttons works, horn also works and indicators canceling works as should.
 
				 
 
		 
 
		 
 
		
 
 
		 what to do with it now...?
 what to do with it now...? 
				 
				