Mercedes E550 Coupe - A doctor's delight

Since my grandmother bought her first one after my grandfather died 35 years ago, I have been a fan of Mercedes. Through generation after generation, the cars seem solidly-built, timelessly-styled, and always at the top of their class. My grandmother always purchased entry-level sedans: Two 280Es, a 190E, and C220. She would drive them 170,000 miles and trade them off for the next generation –