To help me understand the issue better, please tell me:
* What exactly happens when you turn the key? Does the engine crank (turn over)? Does it make any unusual noises?
* Have you checked any warning lights? Are there any dashboard lights illuminated that could indicate the problem?
* Have you recently done any work on the car? Any repairs or maintenance that could be related to the issue?
* What year and model is your Berlingo? This can help me narrow down potential causes.
Once you provide more information, I can give you some potential causes and troubleshooting steps. However, remember that this is just general advice. Always consult a qualified mechanic for a proper diagnosis and repair.
