In general, Benz electric steering locks (ESL) are used with EIS W204/ W207/ W212. ESL is damaged in high frequency. In this case, there are two possible reasons and solutions:
How to tell if the ESL motor is damaged or NEC chip is locked?
Open VVDI MB tool software. Click “Check ESL damage status”.
Replace a new motor, what need to buy?
--OEM MB ESL motor+ MB ESL dowel pin+ MB EIS removal tool
This full kit of MB ESL motor is available at:
This new ESL/ ELV emulator is recommended for your replacement:
How to replace ESL with VVDI MB BGA Tool?
Step1. To replace ESL, you need renew EIS at first, then re-write EIS and personalize ESL, in this way ESL is synchronized. To renew EIS, both key password and erase password are required.
Note: if you do not renew ESL first, but only personalize ESL, the ESL won’t be synchronized.
Use VVDI MB NEC Key Adaptor to work with VVDI MB BGA tool to get key password.
Step2.
Step3. Click “Personalize W204 ESL”
Step4.
After above steps, all EIS and ESL status checkboxes will be tick except the “Activated” checkbox. Insert the original car key hen EIS and ESL is activated. Now you use VVDI MB tool to renew ESL successfully.
Note:
It’s hard to buy Mercedes W204/207 EIS and they are expensive. If you have W204/ 207 all key lost, you can use W212 EIS for replacement.
This is from www.eobdtool.co.uk website Xhorse technical support:How VVDI MB BGA tool renew EIS and replace ESL for Mercedes Benz?