Ungetestet:
stock getNearTankstelle(playerid) {
new Float:distanz[2], tank;
distanz[1] = 90000.0000;
for(new i; i < sizeof (Tankstellen); i++) {
distanz[0] = GetPlayerDistanceFromPoint (playerid, Tankstellen[i][tx] , Tankstellen[i][ty] , Tankstellen[i][tz]);
if(distanz[0] < distanz[1]) {
distanz[1] = distanz[0];
tank = i;
}
}
return tank;
}