I am looking for suggestions on a sagging problem on my 82 300TD wagon with approximately 200,000 miles. I assume this is the original suspension equipment since I've owned the car for about 80,000 miles of its life. I am prepared to replace shocks and springs if needed and would like some pointers to evaluate if I need to consider replacing the hydraulic units as well. Open to experienced suggestions. Any recommendations on specific shocks would also be appreciated! Thanks.