It appears that over the past week or so, the SLS reservoir has completely emptied of fluid in my driveway. And I obviously no longer have a working SLS system.

Is there an obvious place that I might have a leak to look for? On my '81, the reservoir is at the very front passenger side of the car. I know there is a line leading over to the pump from there. Since it was leaking also while the car was at rest, does it make sense that the leak was somewhere between the tank and the pump?

Is there a 'good' way to check for leaks. Thanks for any advice.

__________________
1981 300TD
1985 300TD