URO Parts 1192000222 Fan Clutch Replacement for BMW Mercedes Audi - Heavy Duty Cooling System Component for Hot Weather & Towing Use

I ordered this part for my 2000 Mercedes E430 4matic. My OEM clutch looks exactly like the part pictured with a solid band bi-metal thermostat however the first part I received had a coil spring similar to the lower priced models for other vehicles (similar to 078 121 350A ). I immediately returned it and the replacement which arrived very quickly looked the same as the first with the coil. I needed to install it to get the vehicle back on the road so could not go through another delay exchange cycle. The part fits fine but is extremely loud compared to the OEM clutch, I believe they are substituting a lesser model in place of the item advertised. Very disappointing.