Mercedes Benz E-class, C-class, GLK class, its chassis model 204, 207, 212 direction lock (ELV) is often damaged, its fault point is also common. When there is a problem with the direction lock, the key can be controlled normally, the instrument cannot be lit when the key is inserted, the direction lock is in a static state, and the vehicle cannot be started.

针对以上故障小编总结出以下两种故障点四种维修方法供大家参考。

In view of the above breakdown, the following two breakdown points and four maintenance methods are summarized for your reference.

故障点：

Fault point:

一、方向锁电机损坏

1、 The direction lock motor is damaged

二、方向锁CPU锁死

2、 Direction lock CPU locked

确认问题，确认问题一般有两种方法，一种判断：将钥匙插入锁头，会听到方向锁继电器会工作，但是方向锁无法解锁（属于电机损坏）。二种建议将锁头、方向锁拆下，使用VVDIMB设备连接奔驰平台，读取方向锁数据并检测ESL是否损坏。若损坏则表示为方向锁CPU问题，若提示正常则表示电机问题。

First, confirm the problem. There are generally two ways to confirm the problem. One is to judge: if you insert the key into the lock, you will hear that the direction lock relay will work, but the direction lock cannot be unlocked (it belongs to motor damage). Two suggestions are to remove the lock head and direction lock, connect the Benz platform with vvdimb equipment, read the direction lock data and detect whether the ESL is damaged. If it is damaged, it means the CPU problem of the direction lock. If it is normal, it means the motor problem.

一、方向锁电机问题维修：

1、 Direction lock motor problem repair:

将方向柱锁从车辆拆下，如果方向锁为锁死状态，需要先将方向锁手工解锁。在红圈位置切口，使用锯条手工转动方向锁电机（往右旋转），手工转动到一定位置后，方向锁即可手工解锁。将方向锁螺丝拆掉，按下弹簧螺栓将方向锁取下。

Remove the steering column lock from the vehicle. If the steering column lock is locked, manually unlock the steering column lock first. Cut in the red circle position, use the saw blade to manually rotate the direction lock motor (to the right). After manually rotating to a certain position, the direction lock can be manually unlocked. Remove the direction lock screw and press the spring bolt to remove the direction lock.

方向锁四角有四个销钉，可使用自 制工具（也就是螺丝刀摸尖），砸进去之后旋钮出四个销钉。

There are four pins at the four corners of the direction lock. You can use a self-made tool (that is, a screwdriver tip) to smash it in and then turn the knob out of the four pins.

拆下后方向锁电机明显有烧黑痕迹，更换全新电机。

After the removal, the motor of the direction lock has obvious black marks. Replace the motor with a new one.

在安装时需要注意两点，一点此处有一开关容易卡住，在安装时需要将开关顶回。二点此轴需要推回起点或者终点，在扣盖时，需要检查此轴有无错位。以上两点有一点无按照要求装配，都会导致方向锁用一段时间后CPU锁死。

Two points should be paid attention to during installation. One point is that a switch is easy to get stuck here, and it needs to be pushed back during installation. The two-point axis needs to be pushed back to the starting point or the end point. When the cover is buckled, the axis needs to be checked for dislocation. If the above two points are not assembled according to the requirements, the CPU will be locked after the direction lock is used for a period of time.

二、方向锁CPU锁死维修（CPU锁死一般有三种维修方法）：

2、 Direction lock CPU lock maintenance (there are three maintenance methods for CPU lock in general)

1、使用VVDIMB等设备将方向锁里的NECCPU拆下，进行尝试解锁，解锁时间较长，次数较多，并且不一定能成功。

1. Using vvdimb and other devices to remove the neccpu in the direction lock and try to unlock, the unlocking time is long, the number of times is more, and may not be successful.

2、订购全新锁头与绿钥匙，重新学习钥匙。订购时间长，价位昂贵。

2. Order a new lock and green key, learn the key again. The order time is long and the price is expensive.

3、使用VVDIMB更换二手方向锁、全新方向锁或ELV模拟器

3. Use vvdimb to replace used directional lock, new directional lock or ELV simulator