 I have owned the E350 sedan for a year and a half and alternate it between a 2009 S550 and a 2007 BMW 530i. I live in Costa Rica where the roads consist of endless pot holes and hap-hazard patches with undulating curves and steep inclines. The E350 has proven to be a very capable car and is the one I choose for the twisty mountain roads. It is not outright sporty, but extremely agile and confident on the curves and absorbs the rough surfaces without completely isolating the driver, no simple feat considering the coil suspension. The engine and transmission make short work of passing and climbing steep hills and the brakes don't exhibit fade on long downhill treks. Overall, highly impressed.