  We study the combined effects of electron-phonon coupling and dot-lead
repulsion in the transport properties of the Anderson-Holstein model. We employ
a recently proposed nonperturbative method to calculate the transient response
of the system. By varying the initial conditions for the time propagation the
current exhibits transient oscillations of different nature. We are able to
disentangle two dynamical processes, namely the local charge rearrangement due
to the dot-lead contacting and the establishment of the nonequilbrium many-body
state due to the application of the external bias. These processes involve
either Franck-Condon excitations or transitions between the resonant level and
the Fermi energy of the leads.
