[CAR]

give your vehicle an ID like:

pawn Код:

new MyVehicle; // on top

OnGameModeInit

pawn Код:

MyVehicle = AddStaticVehicle(451,...,.....);

OnPlayerEnterVehicle

pawn Код:

if(vehicleid == MyVehicle)
{
  new string[64];
  format(string, sizeof(string), "%d has entered MyVehicle", playerid); // change message what you like
  SendClientMessageToAll(0xFFFFFF, string);
}

This should work