The Eibach PRO-KIT is the manufacturer's street-oriented performance spring line, designed to enhance both the performance and appearance of a vehicle. For the W205 Mercedes-Benz C300 it replaces the factory coil springs at the front and rear, lowering the center of gravity for a sportier stance while keeping the ride comfortable for daily driving. The manufacturer says the kit is tuned for stock dampers, so you can lower the car without also replacing the shocks.
Compared with stock springs, this set gives a noticeably tighter stance and less body movement when cornering, accelerating, and braking, without the harsh ride of a track-focused setup. It also sits below the manufacturer's Sportline springs in aggressiveness, which makes it a practical choice for a C300 used mostly on the street and for owners who want a lower look without coilovers. Owners on user forums have installed PRO-KIT springs on 2016 C300 Sport models, so the W205 chassis has real-world history with this kit.
Yes. The manufacturer states that checking wheel adjustment is required after the spring and suspension installation is complete.
The manufacturer advises that if the factory shocks have lost most of their effectiveness, they should be replaced, and it recommends sport shock absorbers when lowering springs are fitted. Owners on user forums have also reported the ride settling over the first few hundred miles.
Installation is a moderate-difficulty job that calls for a lift or jack stands, a set of quality spring compressors, and an alignment shop afterward. The manufacturer recommends having lowering springs installed by a qualified workshop with the proper tools. Owners on user forums describe the front struts as the more involved job, and warn that cheap compressors can slip or fail on the stock springs. Expect the car to need a wheel alignment, and expect some settling before the final ride height shows.
