For a Zoe with a range complaint, Dialogys Online provides the procedure to read cell voltages via the BMS (Battery Management System) using the CLIP tool. It then guides the tech through cell balancing or module replacement.
For the independent garage, subscribing to Dialogys Online is a statement of professionalism: it says you will not guess, you will not reuse old data, and you will not skip critical safety steps. For the dealer, it is non-negotiable daily infrastructure. For the home mechanic, it is a tantalizing but often unreachable treasure trove.
New Renault vehicles receive OTA software patches. Dialogys Online includes a module that tells the technician which version the car should be on versus what it is on. If an OTA failed, the manual USB-flash procedure is documented here.