hello guys, i want to ask all the mercedes gurus what is involved in such a process?? after researching i found the following needs to be changed,

the engine 1997 320 m104 complete with wiring harness and all accesories
1997 Transmission the one with the w/s
ECU + Transmission CU
Radiator
engine mounts

anything else??

another consern will it adapt to the existing Contol unit for the security the one for the keys?? will there be a major electrical issue for adapting it or is it plugging the new stuff in??

thnx in advance