[Tigerkiller]

pawn Code:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    if(vehicleid == Ambulance1 || vehicleid == Ambulance2 || vehicleid == Ambulance3
    || vehicleid == Ambulance4 && gTeam[playerid] != TEAM_COP) // Define your Cop Team if you haven't yet
    {
        SendClientMessage(playerid, INFO, "[WANTED LEVEL] Wanted level 2 - Stealing an Enforcement vehicle!");
        SetPlayerWantedLevel(playerid, GetPlayerWantedLevel(playerid) +2);
    }
    return 1;
}