Cheap Mercedes-Benz EQC Flywheel

No — the EQC is a fully electric vehicle and has no internal combustion engine, so it has no flywheel at all. Flywheels are components of petrol or diesel engines, used to smooth power delivery and connect the engine to the gearbox; neither exists in the EQC's drivetrain. If you think you need a flywheel, it's worth double-checking you have the right vehicle, as the EQC shares its name and some styling with no combustion-engined equivalent in the Mercedes range.

It's almost certainly a mistake or a miscommunication. The EQC uses dual electric motors and a fixed-ratio reduction gear rather than a conventional engine and gearbox, so there is no flywheel anywhere in the drivetrain. It's worth going back to whoever quoted you and confirming exactly what component they are referring to, as they may have pulled up the wrong vehicle or part.

The most likely candidates are components of the EQC's electric motor assembly or its reduction/differential unit, which handle torque delivery in a similar functional role to what a flywheel does on a combustion engine. If you're experiencing vibration, drivetrain noise, or a fault related to power delivery, the relevant parts would be motor mounts, the rotor assembly, or the drive unit itself — a Mercedes specialist or breaker who handles EV parts would be best placed to identify what you actually need. Describing your symptoms to the breaker rather than naming a part will get you a more accurate result.

No — the EQC was sold in the UK from 2019 onwards exclusively as a battery-electric vehicle throughout its entire production run, with no petrol or diesel variant ever offered. There is no year or trim level of EQC that left the factory with a flywheel. If your vehicle has had unusual modifications you're unsure about, a VIN check or inspection by a Mercedes specialist would clarify the drivetrain.

No — the 400 badge on the EQC refers to the dual-motor electric powertrain configuration, not a combustion engine, and no EQC trim level has ever been fitted with a flywheel. Trim level makes no difference here because the fundamental issue is that the EQC is entirely electric across the whole range. If you're sourcing parts for an EQC 400, a breaker experienced with Mercedes EV parts will be able to help identify the correct drivetrain components for your needs.