济南奔驰汽车的发动机由五大系统构成，即冷却系、燃油系、润滑系、点火系和起动系，当这五大系统和电脑程序工作均正常时，发动机便没有无法起动的理由，所以发动机检查还要从这五大系统入手。
Ji 'nan Benz engine consists of five systems, that is, cooling system, fuel system, lubrication system, ignition system and starting system, when the five systems and computer programs work normally, the engine will not be able to start the reason, so the engine inspection should start from the five systems.
冷却系
The cooling system
检查冷却系时的需放在防冻液上，一方面要查看防冻液液位是否明显不足，如有类似情况，需排查冷却系统是否存在渗漏。
When checking the cooling system, the center of gravity should be placed on the antifreeze. On the one hand, it is necessary to check whether the antifreeze liquid level is obviously insufficient. If there is a similar situation, it is necessary to check whether there is leakage in the cooling system.
另外一方面，需要用仪器测量防冻液的化学状态，我们常见的防冻液检测就是测试冰点，实际这样的检查并不能完全看出防冻液的好坏，相比之下，防冻液的pH值是容易被忽视的。
On the other hand, the need to use instruments to measure the chemical state of antifreeze, our common antifreeze detection is to test the freezing point, the actual inspection can not fully see the quality of antifreeze, by contrast, the pH value of antifreeze is easy to be ignored.
点火系
The ignition system
点火系主要由点火线圈和火花塞构成，检查时可通过点火线圈的外观状态进行评估，特别是对包裹火花塞绝缘柱的密封圈进行检查，一旦密封圈老化，会出现漏电的不良现象，导致点火能力差。
Ignition system is mainly composed of ignition coil and spark plug, inspection can be evaluated by the appearance of the ignition coil, especially the sealing ring of the spark plug insulation column inspection, once the sealing ring aging, there will be a bad phenomenon of leakage, resulting in poor ignition ability.
济南奔驰汽车保养认为虽然火花塞是点火系中的重要元件，但它也能反映出燃油供给系统的状态。这是因为火花塞螺口以下的部分位于燃烧室内，如果燃油过多，火花塞头会附着黑色的积碳。
Ji 'nan Benz automotive maintenance that although the spark plug is an important component in the ignition system, but it can also reflect the state of the fuel supply system. This is because the part below the spark plug screw is located in the combustion chamber. If there is too much fuel, the spark plug head can be attached to the black carbon deposit.
起动系
The starting system
发动机和变速箱油液会随着气温的降低变得粘稠，在发动机起动的瞬间，负荷会明显增加。其中，起动机和电瓶的负担会尤为凸显。起动机会在运转的瞬间产生强大的低扭，以带动发动机齿盘，由于瞬间电流极大，故而长时间起动可能会造成起动机控制机构的触点烧蚀，影响起动时间。
The engine and transmission oil will become thick with the decrease of temperature, and the load will increase significantly at the moment the engine starts. Among them, starter and battery burden will be particularly prominent. The starter will produce a strong low twist at the moment of operation to drive the engine gear plate. Due to the great instantaneous current, a long time starting may cause the contact ablation of the starter control mechanism, affecting the starting time.
由于起动电流相当大，所以起动机使用的电线是全车更粗的，足够的线径可以保障电路的稳定，同时还要确保接头通电流畅。对于连接车身的搭铁点，技师也会逐一检查，对于生锈的搭铁点，会用除锈剂甚打磨的方式处理。
Because the starting current is quite large, so the starter uses the thickest wire of the whole car, enough wire diameter can ensure the stability of the circuit, but also to ensure that the connector is energized smoothly. For connecting the body of the iron point, the technician will check one by one, for the rust of the iron point, will use rust remover and even the way of grinding.
另外，在检查前，技师会先对机舱进行简单除尘，并铺设翼子板布，目的无需赘述--减小尘土对检查的影响，同时防止技师在维检的过程中误伤车辆外观件。更多内容可以通过点击网址
www.lutongqixiu.com来我们网站进行咨询吧。
In addition, before the inspection, the technician will first carry out simple dust removal on the engine room, and lay the wing board cloth, the purpose is needless to say -- reduce the impact of dust on the inspection, and prevent the technician from accidentally injuring the vehicle appearance in the process of maintenance. For more information, please click on www.lutongqixiu.com to consult our website.
