I have an M110 vehicle, great motor but likes to drink oil and seep between the cam box and heads.  (read not too reliable)  
 
M103 would be your best bet. 
 
 
 
Yes, do it.  These Diesel vehicles don't get stellar economy by any means.  Hell, you can get an M103/five speed in there for good fun and better economy yet.   
 
Or, sell that 300TD and get a 300TE.  You'll LOVE the updated suspension on the W124s, the better HVAC system, etc.
			
				
			
		 
		
		
		
			
		
		
		
		
		
			
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				I'm not a doctor, but I'll have a look.        
 
'85 300SD    245k   
'87 300SDL  251k 
'90 300SEL  326k 
 
Six others from BMW, GM, and Ford. 
 
Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
			  
		
		
		
		
		
	
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