Try all available keys. If one key starts the car and another gives Error 1.3 – the faulty key has a damaged transponder (not the battery). Mercedes transponders are passive (need no battery), but they can crack.
A flat battery or jump-starting the vehicle often corrupts the sensitive EEPROM data in the modules.
To minimize the risk of experiencing the Start Error 1.3, follow these prevention tips: mercedes sprinter vito start error 1.3 skacat-
If you have:
Attempting to jump-start your van can cause a power surge that corrupts the sensitive files in the immobilizer system. Try all available keys
The "START ERROR" message on a Mercedes Sprinter or Vito dashboard is a critical immobilizer failure that prevents the engine from cranking. This issue is most common in older models (like the Vito W638) and typically stems from a desynchronization between the Engine Control Unit (ECU) and the Immobilizer (WSP/Temic) module. Understanding the "Start Error"
Start your diagnosis with a In 80% of cases, the fix is either a synchronized EIS/ECU (via XENTRY), a new key, or repairing one broken wire. Avoid downloading sketchy “skacat” files – no software patch can replace proper hardware diagnosis. A flat battery or jump-starting the vehicle often
is a search term born from mishearing and forum slang, but the underlying problem is real. The “1.3” typically points to a communication breakdown between EIS and ECU – often due to low voltage, bad CAN wiring, a failing key, or a damaged EIS transceiver.
Vito with 5G‑Tronic (722.6) has the ESM shifter module. A dead ESM causes “Start Error 1.3” because the ECU waits for “Park” signal. – Unplug ESM. If error changes, replace ESM (used units need coding).