If I were you, I would take the car to a good independent mechanic and have them check the system out.

I am not an expert, but having own wagons for over 20 years, I have learned a few things about SLS systems.

The rear shocks are the most expensive parts of the whole system. I would check first other possible causes for the system not to be working properly before just changing the shocks.

If the system was functioning unproperly (sending too much pressure) causing the leaking lines and broken valve, it is very possible the shocks were also damaged.

Once the shocks are damaged (heavy oil leaking a clear visible sign for failure) there is no option, new ones are the only way out ($$$!).

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]