How to Use MB TOOL DOIP to Roll Back Mercedes EZS ECU Time (Complete Step-by-Step Guide)

This tutorial is tailored for Mercedes repair technicians and automotive electronics modification specialists. It covers the full workflow of using MB Box DOIP to complete EZS ignition lock ECU time rollback. The guide includes device scanning, one-click EZS time rollback, manual Flash programming, advanced diagnostics, certificate setup, error troubleshooting, plus full operation risks, pre-work requirements, and supporting professional coding services.

Table of Contents

  1. Pre-Operation Critical Preparation & Risk Warnings
  2. Step 1: Scan Vehicle & Identify All Onboard ECUs
  3. Step 2: Two Methods to Roll Back ECU Time (EZS One-Click Back Time / Manual Flash Programming)
  4. Step 3: Post Time-Rollback Operation – SECOC Authorization
  5. Step 4: Advanced Diagnostics Function Walkthrough
  6. Step 5: Certificate Configuration for Xentry & DTS Connection
  7. Common Error Troubleshooting & Recovery Solutions
  8. Tool Subscription & Professional Coding Support Service
  9. Software Download & Login Credentials

1. Pre-Operation Critical Preparation & Risk Warnings

1.1 Mandatory Hardware & Power Requirements

  • Maintain stable power supply for the vehicle and ECU throughout the full programming process. Voltage fluctuations will trigger EZS time jump or permanent hardware damage.
  • Do not disconnect the ENET OBD cable, DOIP network connection, or vehicle power supply at any point during coding or flash writing. Mid-process disconnection may brick the EZS module completely.
  • Before starting a new task: Unplug and re-plug your ENET OBD adapter, then re-click Scan Devices to refresh the vehicle communication channel.
  • MB Tool DOIP only works with ENET cables. It is incompatible with MB Star C4, C5, C6, factory original VCI, and all other official Mercedes-Benz diagnostic tools.

1.2 EZS Physical Wiring Rule (Must Follow Strictly)

Disconnect the two large wiring plugs marked with red crosses on the EZS module.

  • Only keep the small Socket 5 connected
  • Supply external 12V power to Pin 1 (+12V) and Pin 28 (-12V)

Skipping this wiring step will lead to a 100% failure rate for EZS time rollback and time jump errors.

1.3 Software Compatibility Restrictions

  • The one-click EZS Back time function only supports Mercedes 802~805 series vehicles. cannot support 801 and 806 cars. Can do 223 206, Cannot do 167 177 and 213.
  • This automated time rollback tool only works with original, unmodified factory EZS firmware. If your EZS has aftermarket or rewritten software, DO NOT use the one-click function — switch to manual Flash programming instead.
  • VPN use is highly discouraged during programming; network latency will interrupt data writing and corrupt ECU coding files.

1.4 Risk Disclaimer

  • We cannot fully eliminate the risk of EZS time jump, though the failure probability remains extremely low when following standard operating steps.
  • Any interrupted programming may render your ECU irreparable. Users bear all operational risks if official procedures are ignored.
  • The complete EZS time rollback workflow takes roughly 20 minutes. Do not close the software until all function buttons are no longer greyed out.

1.5 Mandatory Coding Backup Step

The software will automatically export the full EZS coding data as an .aed file and save it to your desktop.

  • Store this backup file permanently until all vehicle function tests pass without issues.
  • If errors appear during operation, you must use this backup file to restore the original EZS coding via DTS software.

2. Step 1: Scan Vehicle & Identify All Onboard ECUs

2.1 Scan Connected Devices

Launch MB Box DOIP software, then click the Scan Devices button located on the top navigation bar. The system will automatically detect all DOIP/ENET communication interfaces and display your vehicle VIN, logical address, and connection IP.

2.2 Full Vehicle ECU Identification

Click the Identify Vehicle button to start a full vehicle ECU scan. The software will list all online control modules inside the ECU table on the right panel. This step verifies which ECUs are accessible for subsequent programming tasks.

2.3 Pre-Read for Individual ECUs (Non-EZS Modules)

If you need to perform time rollback on ECUs other than EZS:

  1. Tick the target ECU from the search list
  2. Click Read ECU to load full module data
  3. Click BackTime to finish standard time rollback

Wait until the progress bar shows Operation Finished before moving to other work.


3. Step 2: Two Methods to Roll Back EZS ECU Time

3.1 Method 1 – One-Click EZS Back Time (Recommended for 802~805 Vehicles Original Firmware)

This built-in automated function reduces manual error and minimizes time jump risks for supported 802~805 vehicles.

  1. After vehicle identification completes, select EZS223 from the ECU list
  2. Navigate to the Special Functions tab and click the EZS Back time button
  3. A pop-up confirmation window will remind you this function only works for 802~805 vehicles. Click OK to proceed.
  4. Rewire the EZS module strictly following the wiring diagram listed in Section 1.2 before confirming the process.
  5. The software runs automatic time rollback logic in sequence:
    • The EZS internal time is first rewritten to 2011
    • Full EZS coding restoration runs automatically after time modification
    • The final ECU time resets back to the original factory year (2022 for our demo vehicle)
  6. Check the operation log at the bottom of the screen for the line Flash Coding restore completed — this line confirms successful coding recovery.



3.2 Method 2 – Manual Flash Programming (For Modified EZS Firmware)

Only use this workflow when your EZS does not retain original factory software:

  1. Switch to the EZS Flash tab on the top navigation bar
  2. Click Select Flash to open the firmware package list, choose the matching EZS software variant for your vehicle, then click OK
  3. Back up original coding first: Click Backup Coding, name your .aed save file, and save it to your desktop.
  4. Optional loop programming setup: Adjust the Count value to set repeated flash write cycles if required.
  5. Click Programming to start manual firmware flashing and time modification.

3.3 Critical Post-Rollback Verification Check

After finishing either time rollback method:

  • Review the bottom operation log to confirm coding restoration completed successfully.
  • If the log states coding recovery failed or incomplete, open DTS Monaco and manually write your saved .aed backup file back into the EZS module.


4. Step 3: Post Time-Rollback Operation – SECOC Authorization

SECOC security coding can only be executed after EZS time rollback finishes completely.

  1. Keep EZS223 checked inside the ECU list
  2. Remain on the Special Functions tab
  3. Click the SecOC button to launch security authorization for the target ECU.


5. Step 4: Advanced Diagnostics Function Walkthrough

The Advanced Diagnostics tab supports full ECU data reading, fault code management, and module reset operations for troubleshooting vehicle electronic faults.

5.1 Read Core ECU Information

Right-click your target ECU in the list to access full diagnostic commands:

  • VIN Data Identifier Read
  • ECU Hardware Number / Software Number Read
  • ECU Serial Number & Manufacturing Date Read
  • Extended Diagnostic Session Activation

5.2 Hardware & Soft ECU Reset

Run HardReset (11 01) or SoftReset (11 03) to reboot the selected ECU without cutting vehicle power supply.

5.3 DTC Fault Code Read & Clear

  1. Click Read DTC to pull all active and history fault codes stored within the ECU
  2. Click Clear DTC to erase all saved trouble codes. Confirm the log displays DTC Clear done to verify successful clearing.

6. Step 5: Certificate Configuration for Xentry & DTS Connection

6.1 Core Logic of Certificate Modes

Navigate to the Special Functions tab and open the Certificate panel:

  • Diagnostics / Programming Certificate: Used for authorization matching new calendar dates
  • Coding / Development Certificate: Mandatory selection after EZS time rollback, prevents automatic date sync that causes time jump back to the current real-world year

6.2 Mandatory Disconnect Rule Before Launching Xentry/DTS

A warning pop-up will display when opening Certificate settings: Disconnect all active ECU connections inside MB TOOL DOIP before opening Xentry or DTS Monaco. Skipping this step will block all vehicle communication in Xentry/DTS.

6.3 Test Certificate Validity

If Xentry or DTS cannot connect using valid certificates:

  1. Click Test Certificate to verify certificate integrity
  2. If the test fails, restore the original Zenzefi client file before retrying authentication.


6.4 Full Xentry Launch Walkthrough

  1. Fully close MB Box DOIP software after disconnecting all ECU links
  2. Open the Xentry_ENET.exe shortcut on your desktop
  3. Select your DOIP hardware adapter from the device selection list
  4. Log in with your authorized Xentry account and start vehicle diagnosis.

7. Common Error Troubleshooting & Recovery Solutions

7.1 Error Popup: EZS223 is not reachable (EZS Flash Recovery)

This error triggers when ENET communication drops mid-programming.

Fix Steps:

  1. Unplug and reinsert your ENET OBD adapter
  2. Click Continue Programming — do NOT click Cancel
  3. If you accidentally click Cancel, you must restore the ECU using your pre-saved .aed coding backup file. Without this backup, the EZS Back Time function will be permanently unavailable for this module.

7.2 EZS Time Jump After Completing Operation

Root Causes & Fixes:

  • Failed to disconnect unused EZS wiring plugs per the pin diagram → Rewire EZS strictly following Section 1.2
  • Used modified non-original EZS firmware → Switch to manual Flash programming workflow
  • Opened Xentry without selecting the Coding/Development certificate → Reconfigure certificate mode correctly
  • Unstable vehicle power supply during programming → Use a stable 12V battery charger for the entire process

8. Tool Subscription & Professional Coding Support Service

8.1 Software Subscription Pricing

  • Current limited promotional rate: $200 per month
  • Pricing will increase significantly starting tomorrow, and this discounted monthly price will no longer be available long-term
  • Accepted payment methods: PayPal, Alipay

8.2 One-on-One Live Professional Coding Training Service ($300 One-Time Fee)

Ideal for beginner technicians with no offline SECOC experience or unfamiliar with EZS physical pin disconnection and rewiring:

  1. Our senior automotive electronics technician shares screen to demonstrate the full MB TOOL DOIP workflow live remotely
  2. Every step of EZS time rollback, Flash programming, and certificate configuration is covered in real time
  3. Eliminate costly operation errors that lead to permanent EZS time jump failures
  4. Full pre-recorded reference tutorial video: https://youtu.be/V2vGtP-fHTg

8.3 Eligibility Reminder For Buyers

This MB TOOL DOIP software is designed exclusively for professional automotive electronics repair technicians. We do not recommend purchasing the tool if you lack hands-on experience with:

  • Offline SECOC security coding procedures
  • EZS module physical pin disconnection & rewiring

Alternative solution: Purchase our $300 live one-on-one coding service instead of self-operating the tool alone.

8.4 Liability Statement

If you skip the training video or live coding service and make procedural mistakes leading to EZS time jump or ECU damage, we cannot take responsibility for related module repair costs or failures.

9. Software Download & Login Credentials

9.1 Register Account in website

9.2 Download the software

Download the software from this link

9.3 Install the software

  • Login ID: Your personal registered email address
  • Password: same with your registered password

Active the account

Your can buy the MB TOOL DOIP in our website directly or contact with our customer service to get a big discount. we will active the account for you.

Ready to Start Your Mercedes ECU Programming Workflow?

Grab our MB TOOL DOIP monthly subscription at the limited-time $200 rate before pricing rises tomorrow. If you’re new to EZS time rollback coding, secure our $300 live one-on-one training service to avoid costly ECU damage from incorrect operation. All software downloads, tutorial videos, and professional after-sales technical support are included with every purchase.

Frequently Asked Questions

Q: Which Mercedes vehicles support the one-click EZS Back Time function?

A: Only 801-805 chassis models equipped with factory unmodified original EZS firmware. All other EZS variants require manual Flash programming instead.

Q: How long does a full EZS time rollback operation take?

A: Approximately 20 minutes of uninterrupted programming time with stable power and network connection.

Q: Can I use VPN while running MB TOOL DOIP software?

A: Not recommended — VPN network interruptions will corrupt ECU coding backup files and cause programming failure.

Q: What happens if I lose my .aed coding backup file?

A: You will be unable to restore the original EZS coding after flash errors. Always save the desktop backup file permanently after every operation.

Q: Can I launch Xentry immediately after finishing EZS back time?

A: You must disconnect all ECU connections within MB TOOL first, then select the Coding/Development certificate mode to prevent automatic time sync back to the current date.