I would never by a 'Corolla' as someone suggested only because of the problems Toyota is experiencing now.
I never suggested you buy a Corolla. However, if you don't like the potential for expensive and problematic service issues, you should reconsider owning an older Mercedes. I sold my last Mercedes about 2.5 years ago and haven't looked back, truth be told. I was lucky to have a local indie tech that was amazing and saved me tons of money, but the "small" things just ate me up. They're terrific cars to drive and the company is an amazing innovator in the industry, but I'm just not willing to spend the money for the upfront cost and then be $500-to-death as well once the warranty is up.
As I stated in my previous post, Mercedes has a long history of NOT fixing known problems. Sure, they do with some things, but not on "minor" items. The faulty engine wiring harnesses were replaced with a better unit, and Mercedes paid the tab (which was $$$$) even if you were out of warranty AND the original owner. Second owners without warranty coverage got a bill. They did try to improve the head gasket on the M104 DOHC six cylinder engine, but most owners still face periodic replacements at about $2K a pop, more at a dealer.
We owned a W210 E-Class, and it was a horrible car. Easily the worst Mercedes of all I owned. The interior materials were not even as nice as the same model year C-Class we owned, and the build quality was appalling. The dash cracked, the seat mounts broke, the window regulators broke, the electric mirrors broke (as did the heating elements in the mirrors), the mono-wiper gear set (was brass in the W124, cheap-:censor: plastic in the W210) broke, ($1900 part alone!!!) and the while the diesel engine was a joy, the glow plugs wore out about every three months (or less) and it failed to start/run. Oh, and that's the tip of the iceberg. Many other problems plagued that car. (Engine mounts, ACC control units, fuel level sensors, SRS control units, FI metering units, spring perches (a horrible safety issue) and on and on...)
People seem to be buying into the "Toyota has lost it" BS, but I can safely say that the Corolla we own has been far superior in build quality and reliability to ANY Mercedes we owned. Not one of our cars made it to the 70K mark without a single repair, even my C230, the best of the MBs we had. Oh, yeah, the Corolla is crap to drive, but in terms of "get in and drive and NEVER visit the dealer except for service" it kicks Mercedes ass every day.
Here's the thing to do if you want to own an older E-Class. Spend time on some MB forums and you'll quickly learn what the trouble spots are and how to solve them without spending massive amounts at the dealer. Find a good indie tech, and you'll save so much money it will shock you.