I have been experienceing several fluid leaks on my '92 500 sl. 1st it was the power steering pump, then the valve covers and now it is the differential is starting to drip oil. I have discussed w/ several people ( non mechanic ) and they seem to think that it is because of lack of driving. the car has 39.5 K miles on it and i drive it about 1500 miles per YEAR. Can this be the cause of my problems?? Will starting the car every day help?? Any mechanic's out there? Thanks