public BenzModel getABenzModel() {
        // һЩԱעĵط
        this.sequence.clear();
        // ֻABenzModelִ˳
        this.sequence.add("start");
        this.sequence.add("stop");
        // ˳򷵻һ۳
        this.benzBuilder.setSequence(this.sequence);
        
        return (BenzModel) this.benzBuilder.getCarModel();
    }