Be wary of unrealistic MPG claims. It's a heavy car. Good torque, which you noticed.

Other expensive repairs for the E300 would be head gasket, wiring harness, and leaking evaporator. Important to inspect ball joints, flex disks, and center support bearing bushing. Over 200k miles, expect to maintain suspension and steering components.

I like my E300, and haven't had to deal with the big three potential failures yet. Knock on wood.