03 bmw 3 series remote start

any one done one of these ? any problems to watch out for ?  please let me know MECP installer,technician

most connections can be gotten at the general module behind the glove box.  parking lights are a lil tuff you Need to remove the light switch module from the dash and pop off the front cover. A ribbon cable which connects the switch to the module will be exposed. With the switch facing towards you, you need to interrupt the fourth wire from the left with a relay. When interrupted the parking lights will comes on.  Tach can be gotten inside the car at the diagnoistics plug.Where theres is a wire there's a way.