If you have a V-12 Sl that does not leak, you are ahead in the game. If they get driven often, it is usually ok. However, I have
seen some V-12 garage queens become their owners worst
nightmares.
I had someone come to me in tears after they bought a 1994 Sl600 with 11k miles without an inspection.
This thing was wizzing from everywhere and we gave her a
5 digit estimate to resolve all of her concerns.
I have also seen a 100k example that was bone dry.
It all depends on how the car was driven and cared for.
Getting it checked out is the safest action to avoid buying
a 389hp oil leak.
As I type this, I am repairing an oil leak on a 2001 S600 that
required me to remove the engine to replace a leaking suspension
hose. Thank god for warranties!!!!!
Sorry if I offended any V-12er's.

Best wishes as always.
DR. DIES....I mean DR.V-12