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Elisha Kryukov
Elisha Kryukov

How to Fix Mercedes Sprinter Vito Start Error

How to Fix Mercedes Sprinter Vito Start Error

If you own a Mercedes Sprinter Vito and you see a "start error" message on your dash, you might be wondering what is causing it and how to fix it. The start error message indicates that there is a problem with the immobiliser system, which prevents the engine from starting. The immobiliser system consists of two main components: the WSP (Wireless Service Platform) unit and the CDI (Common Rail Diesel Injection) ECU (Engine Control Unit). These two units need to communicate with each other and with the key transponder in order to allow the engine to start. If there is any disruption or corruption of data in these units, the start error message will appear.

There are several possible causes of the start error message, such as:

Mercedes sprinter vito start error


  • A flat or weak battery

  • A faulty or missing key transponder

  • A damaged or loose antenna coil on the ignition

  • A faulty WSP or CDI unit

  • A jump start or a power surge

  • A fuel pump failure

To fix the start error message, you need to identify and address the root cause of the problem. Here are some steps you can try:

  • Check your battery voltage and condition. A low or dead battery can cause communication issues between the WSP and CDI units. Make sure your battery is fully charged and in good shape.

  • Try a different key. Sometimes, the key transponder can be faulty or missing, which prevents the WSP from recognising it. If you have a spare key, try it and see if it works. If not, you may need to get a new key programmed by a professional.

  • Check your antenna coil on the ignition. The antenna coil is a small ring that surrounds the ignition switch and reads the key transponder signal. If it is damaged or loose, it can interfere with the communication between the key and the WSP. Make sure it is securely attached and not broken.

  • Check your WSP and CDI units. The WSP unit is located behind or underneath the instrument cluster, while the CDI unit is located behind or underneath the glove compartment. You can access them by removing some panels and screws. You need to check if they are properly connected and not damaged. You can also test for power on the WSP plug using a multimeter. Pin 3 should have continuous +12V direct from the battery (red/yellow wire), while pin 7 should have ignition +12V when your key is in position 1 and 2 (black/yellow wire). If there is no power on either pin, you may have a wiring issue or a blown fuse.

  • If none of the above steps work, you may need to re-code or replace your WSP and CDI units. Sometimes, these units can lose their synchronisation due to a jump start or a power surge, which causes data corruption. In this case, you need to re-code them back together using a diagnostic tool and software. This can be done by a professional or by yourself if you have the right equipment and knowledge. Alternatively, you can replace them with new or used units that are already coded together.

By following these steps, you should be able to fix your Mercedes Sprinter Vito start error message and get your engine running again. However, if you are unsure or uncomfortable with any of these steps, we recommend that you seek professional help from a qualified mechanic or an auto locksmith. 0efd9a6b88


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