Vacuum Tests: Notes
WARNING: This page is about a different car, the 2001 Mercedes-Benz SL500 and 2000 Mercedes-Benz SL500. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before performing any vacuum testing, verify Gray vacuum hose to intake manifold is not leaking. Permissible leakage of system (including vacuum lines) at 11" Hg (400 mbar) is .8" Hg (30 mbar) per minute.