So to comment on all that the expert said. It’s a common fault that the tag that stops the shock overextending a bag fails. This is evident when you raise the car - the failed one will drop lower. 
Secondly it can still be a bag leak. Happens in the folds. Soap and water at extended height will help you find one if it exists. 
Thirdly, yes the compressor probably has had the desiccant turn to dust and has blocked the filters so it’s struggling to fill. I suspect you have a combination of faults including a small leak somewhere (valve block, bag, anywhere) plus a tired compressor that needs an overhaul. Combine the two and you’ll be where you are. 
Attack it methodically.  
				
			 
			
		 
			
				
			
			
				2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
			
			
		 
	
Bookmarks