There are many "limp home" substitute values that modern controllers institute to protect them selves. I know of one at 4000rpm and one I think around 1800 rpms. I know of nothing at 3000 rpms.
Most of these strategies are involved with throttle control. The system most responsible is EA/CC/ISC or CC/ISC (electronic accelerator/cruise control/idle speed control).
Bosch Master, ASE Master, L1
33 years MB technician