Hard to say, but I had to say something to the ridiculous price of $1500-2000. Its at least 35 hours by the MB flatrate book. At the corner gas station price of $50/hr that would be 1750 for labor alone.
Now if you want some bozzo to take it all apart and clean it and glue it back together and call it a rebuild maybe 2 grand would do it.
Bosch Master, ASE Master, L1
33 years MB technician