Advice & Downloads Tips & information for VDO partner workshops.

From the guidelines for the EU Mobility Package 1 to information on software upgrades, white papers to FAQs and explanatory videos: Tachograph workshops will find more information, links and downloads here – clearly arranged and all in one place.


White paper

Easily understand the driving and rest times.

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White paper


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White paper

ERRU – European Register of Road Transport Undertakings

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The VDO Smart Tachograph Version 2 is officially Type Approved for use and will be ready for the next phase of the EU Mobility Package 1 on 21st August 2023.

OSNMA (Open-Source Navigation Message Authentication) will not be ready in time for introduction of SMART Tachograph Version 2. It will not be available before December 2023. However, the EU will not delay the implementation date for SMART Tacho 2 (21st August 2023).

Early Smart Tachograph Version 2 units will act as if OSNMA is available (they will be referred to as ‘transitional

When OSNMA is available:

    1. Installation of ‘transitional tachographs’ ceases (within a 5-month window)
    2. It will be possible to update the DTCO software to activate the OSNMA functionality
  • On or after 21 August 2023, a ‘full’ smart tachograph 2 or ‘transitional’ smart tachograph 2 must be fitted into newly registered in-scope vehicles (i.e., goods vehicles over 3.5 tonnes and passenger vehicles with 10 or more seats) undertaking international journeys. If the vehicle is operating only within the UK, then a smart tachograph 1 can continue to be fitted (if still available).

****   Only until 21 February 2024   ****

  • On or after 21 February 2024, a ‘full’ smart tachograph 2 or ‘transitional’ smart tachograph 2 must be fitted into all newly registered in-scope vehicles regardless of journey types.

This is in accordance with Article 3 of the Regulation, the implementation dates for the fitment of the smart tachograph 2 are detailed in the DVSA Special Notice 01-2023.

The above dates are detailed under Item 1 – SMART Tachograph 2 Introduction, points 1 and 4.

Replacement or retrofit of Smart Tachograph Version 1 with Smart Tachograph Version 2 on a vehicle using the VDO DTCO with Stoneridge DSRC system. The Smart Tachograph Version 2 now transmits 25 RTM messages via DSRC. As our RTM/DSRC module is built into the tachograph, replacing a DTCO 4.0 with DTCO 4.1 automatically replaces the module so we can still use the existing DSRC antenna and cable.

With Stoneridge, the RTM/DSRC module is separate to the tachograph, being combined with the antenna. Thus, if the tachograph is updated to VDO SMART Tacho V2, the Stoneridge RTM/DSRC module must also be upgraded or replaced. Here are the options available:

    1. Install the VDO DSRC Antenna and cable and change the settings in the tachograph to reflect that the system is entirely VDO
    2. Replace the existing Stoneridge RTM/DSRC module with an updated version

The CTCII diagnostic line MTCO (A2C59512173) is no longer available.

Instead, the CTCII diagnostic line DTCO (1) can be used together with the Workshop Link adapter MTCO (2)

The CTCII diagnostic line DTCO is part number A2C59512172

The WorkshopLink Adapter MTCO (4 pol.) is pat number A2C59506339

With the introduction of the DTCO 4.1 and its universal device variants, vehicle-specific configurations are now available via the VDO Workshop Tab.


  • Current built-in device: DTCO 4.0 or 4.1
    The universal data sets listed here can only be used for the conversion or retrofitting of existing DTCO 4.0 or DTCO 4.1 devices. These are suitable, for example, for vehicles that are already equipped with a 4.0 device and are now to be converted to a DTCO 4.1 device (For systems with a DTCO 3.0 and older, there will be a separate function in the foreseeable future).
  • VDO Workshop Tab Version 4.9.X
    For parameterization, version 4.9.X must be active on your VDO Workshop Tab. You can obtain this version through a Workshop Tab 36-month service contract or the Feature Package 4.9.


To access universal configurations:

In the main menu, select the "TCO parameterisation" button.

In the submenu, select the "Universal programming" button.

In order to be able to carry out the universal programming for DTCOs that are already activated, it is necessary to insert a workshop card. This is not necessary for DTCOs that are not yet activated.

In the "Select vehicle" function, you will find all vehicle variants available for universal DTCOs. Further information regarding predecessor and successor variants can be found via the variant overview (extranet) or the DTCO catalog.

Select the appropriate data set and confirm with the "Send" button.

In case of incorrect programming, you must first perform the "VDO RESET" record before reprogramming.

If a vehicle manufacturer has several variants for a universal DTCO, you will find them in the respective tab.

In some cases, transmission-specific values have to be transferred to the exchange device. This is done automatically via the device exchange function of the Workshop Tab.

If you do not use this function, compare the TCO and CAN parameters between the old and the new device.

The warnings that appear on the display of the digital tachograph at 4¼ and 4½ hours driving time are defined in law and must allow POA to be used to reset driving time. For example, a 45 minute period of POA will be considered the same as 45 minutes of BREAK by the tachograph. This is due to the legal definitions of continuous driving time and cumulative break as shown below:


POA is generally only counted as BREAK when it is recorded by a co-driver who is taking a BREAK in a moving vehicle (by law, when the vehicle is moving Driver 1 is automatically recorded as DRIVING and Driver 2, the crew mate, is automatically recorded as POA, and these cannot be changed).

Due to these limitations, Stoneridge and VDO have additional ways to display the driving times, break times, etc. on the tachograph. Stoneridge is known as Driver Decision Support (DDS) and VDO is known as VDO Counter. Below is a link to some information on the VDO counter displays (always identified by VDO being displayed in the top left corner of the screen).

For both Stoneridge and VDO tachographs (not early models), it is possible to choose if POA should be included as BREAK or not in the calculations for the Stoneridge DDS displays and VDO Counter displays.

For VDO tachographs, this can be done by a tachograph workshop using their programmer and a Workshop Card. Changing this setting in the tachograph does not require a calibration of the tachograph.

The FARKA connector can be removed from the DSRC cable in a few easy steps and this will support new installations with the DSRC cable and antenna.

Please click on the icon for the detailed instructions.

Informational Downloads

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