power steering

This may be a silly question, but where is the reservoir for the power steering on an '03 S-type R?

On my 2000 S TYPE it's a plastic 12oz reservior container on the right inner
fender of engine compartment.

2003 It's probably time to flush + bleed Pwr steering system.

Capacity = 1quart of WSA-M2C195A

Notes:

Coolant is every 5 years.
Break fluid is 2 years.
Transmission fluid is 150K miles.