Shanghai Volkswagen Passat original car upgrade a key to start the phone starts

Shanghai Volkswagen Passat original car comes with a key to start keyless entry, remote start can upgrade the phone starts after Shanghai Volkswagen Passat original car a key to start upgrade remotely start adding GPS location query modifications to upgrade it, what is the function? Passat original car converted a key to start the phone how to start? The modified function 1, a key change the original car's launch 2, the original car's keyless entry, do not change to increase a keyless entry system that does not break the original car system 3, mobile remote start available startup including telephone, telephone inquiries phone APP operations, opening and closing the lock, activated, after the installation of GPS positioning Passat phone boots, original car we'll use it in the car on the basis of the original installation, the original car's systems can use, after modification, an increase of two keys, is close to the auto-sensing open if carrying the original car keys, or the same, touch the central locking handle to open to the 4S shop, with no modifications to upgrade exactly the same as the previous button or buttons, keys or previous keys, function or the previous functionality, but adds the control function realization phone network interconnection As for how to install the car, please call understanding,