1 ▁August ▁ 1 9 9 0 ▁an ▁Inter city ▁service ▁was ▁established ▁on ▁the ▁Berlin – H amb urg ▁line ▁under ▁the ▁name ▁of ▁Max ▁Lie ber mann , ▁initially ▁with ▁former ▁TE E ▁carri ages ▁ha u led ▁by ▁DB ▁Class ▁ 6 0 1 ▁locomot ives ▁that ▁were ▁h ired ▁by ▁DR ▁from ▁Italy . ▁These ▁operated , ▁however , ▁only ▁up ▁to ▁ 2 8 ▁September . ▁After wards ▁this ▁service ▁was ▁operated ▁with ▁DR ▁class ▁ 1 3 2 ▁locomot ives ▁and ▁DB ▁TE E / IC ▁carri ages . ▁In ▁ 1 9 9 1 , ▁four ▁pairs ▁of ▁trains ▁operated ▁daily . ▁From ▁ 1 9 9 2 , ▁trains ▁operated ▁every ▁two ▁hours . ▁The ▁travel ▁time ▁between ▁Berlin ▁and ▁Hamburg ▁was ▁about ▁four ▁hours . ▁The ▁first ▁sub urban ▁trains ▁from ▁Nau en ▁to ▁Berlin ▁originally ▁terminated ▁in ▁Charlot ten burg , ▁then ▁in ▁Jung fern he ide ▁and ▁later ▁West kre uz . ▁ ▁Ren ov ation ▁and ▁upgrade ▁for ▁ 1 6 0 ▁km / h ▁ ▁In ▁the ▁early ▁ 1 9 9 0 s ▁the ▁German ▁government ▁was ▁considering ▁construct ing ▁a ▁mag lev ▁( mag net ic ▁lev itation ) ▁line ▁between ▁Berlin ▁and ▁Hamburg . ▁During ▁the ▁development ▁of ▁Federal ▁Transport ▁In frastr ucture ▁Plan ▁of ▁ 1 9 9 2 , ▁two ▁options ▁were ▁considered ▁for ▁upgrad ing ▁the ▁Berlin – H amb urg ▁line ▁were ▁also ▁considered : ▁▁ ▁A ▁new ▁line ▁between ▁Ber ged orf