jbls600

Recently purchased 01 S600 and what a nightmare it has been.....It seems everytime I punch it, the vehicle @3,000rpm goes into limp mode and triggers the check engine light. Turn the car off and restart and the car drives normal....Mercedes replaced the r-bank and it went away for about 2 months and now it is doing it again...Also does anyone have any leads on a used or rebuilt suspension pump w/ABC?