I've had my 400H since 9/05 and have the same problem. It started at 10/05, did go to the dealer and they indicated nothing was wrong with it or it did not do it there. It appears to happen when I pull out of the garage or when the vehicle has sat in a parking lot. It is not consistent. The car has been back to the dealer four times. I actually got the noise to happen at the dealer with the 3 techs, service mgr, sales mgr and another service person. They kept the car for 10 days and reset the ISC code and re-learned the procedure. That was done twice and still has not changed. It just got the vehicle back for the four time the other day and it is starting the make the noise again sporadically. I'm in the process of having the dealer request to replace the vehicle. I paid a premium for the car and I feel you should not have the get used or have that noise. Sometimes it can be real bad. Anyone has any othe ideas or suggestions. Car has 8700 miles on it at the moment. The noise sounds like metal against metal knocking and rocks rolling around in the engine.
