  We present a case study for the synergy of combined LHC and LC analyses in
Susy searches where simultaneous running of both machines is very important. In
case that only light non-coloured Susy particles are accessible at a Linear
Collider with an initial energy of $\sqrt{s}=500$ GeV, the precise analysis at
the LC nevertheless leads to an accurate Susy parameter determination. This
allows the prediction of heavy Susy particles. Providing these LC results as
input for LHC analyses could be crucial for the identification of signals
resulting in a direct measurement of the heavy neutralinos. These results
provide an important consistency test of the underlying model. Furthermore,
feeding back the LHC results into LC analyses leads to an improvement in the
parameter determination.
