[Mean]

this goes above the main function

pawn Код:

new vehicle1;

this goes under GameModeInit

pawn Код:

vehicle1 == AddStaticVehicle(bla, bla, bla);

Look for OnPlayerEnterVehicle in your script and add this hope it helps

pawn Код:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    new string[128];
    format(string, sizeof(string), "You are entering vehicle %i",vehicleid);
    SendClientMessage(playerid, COLOR, string);//Replace COLOR with the color of the text you want
    return ChangeVehicleColor(vehicleid,color,color);//Ofcourse change vehicleid and colors
}