It isn't complicated on my gen3 either.....just scroll on the menu till the maintenance reset appears on the led screen, and enter it...done.Gosh..... I didn't realize the reset procedure for my Gen2 was so complex.
Make sure the odometer is not on a trip meter. shut off the key. Push the Trip Meter Zero button, Turn on ignition. Watch odo display do a count down from ------ to -, then the mileage appears. Done.