*** This brand new OEM engine fan clutch (vicostatic) manufactured ACM Europe.   This fan clutch is designed to fit your W210 300D Turbo.   Mercedes list this item for $305.00 but we are selling them for a fraction of that cost.  Mercedes Benz part number for your reference is # 6062000122.  If your engine is overheating, specially when in traffic, this might be your problem.