BMW is known to delete old TSB's for some reason. From what I can find, that TSB advises the tech to update the DME's software to the latest version. There is also an update for 04-06 E53 VTG (Transfer Case Module) that was just released. I have the newest DME software, and it does help the throttle delay a bit, but it's still there. If the DME software doesn't fix it, I would look into the wiring harness for the EML and idle control valve and consider replacement of both. EML's go bad and they can cause an engine failsafe prog message with limp home, and other weird behaviors.