Pentosin makes a variety of fluids.
The only acceptable Pentosin fluid that can be used in your BMW E46 power steering is Pentosin ATF 1.
If he used CHF 11s, CHF 202, ASF 11s, CHF 7.1 or LHM+ then he used the WRONG fluid in your E46. (These are hydraulic fluids that can be used in power steering systems... but NOT in BMW E46 power steering systems.)
You paid him $1,200 to fix your steering. Insist that he use the correct fluid... don't let him tell you that the other fluids are acceptable, because they are not.
BMW specifies an ATF fluid. Period.