Just lowering the car on Eibach's, on the OEM camber adjusts and bolts will result in the wheel alingment being out.
Apart from the fact you won't be getting the best out of your new ride height the tyres may well start to wear unevenly, don't want that.
Eibach sell a kit, adjustable Camber arms (rear) and camber adjusting bolts (front), these are perfect, well priced and do the job very well.
These will then allow you to adjust how the wheel sits in the arch, giving you lots more noticeable grip, traction and even, steady wear on your tyres. You will have to get this done at a wheel alignment center that have a laser system. We can supply you with what it regarded as the best, (soft) settings. It's commonly refereed to as a Fast Road Set Up (FRSU).
I had Eibach springs and camber adjusters on my EP3 and the performed admirably, from the time I fitted them to when I sold the car.
A FRSU is what some consider as the best mod for a EP3.