Clutch and flywheel kit problem on a Mercedes Citan

It's possible that your vehicle does indeed have a dual-mass flywheel, as they are common in many modern vehicles to reduce vibration and improve driving comfort. However, discrepancies can occur between dealers and parts suppliers. I recommend checking your vehicle's VIN with the dealer to confirm the exact specifications and parts required. Additionally, you can consult your vehicle's service manual or contact another authorized Mercedes service center for a second opinion. Let me know how it goes or if you have any further questions!