I am not an expert, but I can tell from the experience I have gathered from my cars:

The pumps that control the power assist systems and door locks on W140s are different (one for each system).

I doubt that both pumps failed at once. Anyway, the pump for the power closing aid on doors and trunk is the one that fails more often. Usually when it begins to fail you can trick the brain of the pump by pulling the fuse in the trunk compartment (not engine) and let it stand for a couple of minutes before reinstalling it. I think is #9 or #12, but don't quote me on that.

If the pump for the power closing aid fails completely, you can close the side doors with a somewhat hard slam without no problem. The trunk requires for you to fiddle with a manual override switch which is located near the lock on the trunk lid. This switch allows the lock post to lower about half an inch, hence you do not have to slam to hard the trunk to close. The manual covers this issue quite well, check on it.

About the fuses, EVEN if they seem OK to you, CHANGE THEM ANYWAY! They're cheap and you could be surprise. Remember to check BOTH fuse boxes on the engine compartment AND on the trunk.

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