I traded an '04 Mercedes e500 for the 545 and am happy with the decision. The 545 is sportier, a bit quicker and grippier on the roads. I have to say, I think the Benz has a few things over my 545 - interior and exterior design primarilly, though the "Banglisms" (designer) on this car are growing on me...
Bluetooth - if you have a bluetooth phone, you have to get connected with this feature. The most under-promoted, awesome feature aside from the car's engine itself! Justifies the iDrive -
Cupholders - sounds petty, but they could not have been designed more poorly by my 14-month old... Horrible and a source of frustration as cans wooble, bottled water doesn't fit and coffee is a non-option.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.