I'd have to agree. A W126 or W124 has to be one of the best cars to own, albeit you'd have to get over the hump of replacing a wiring harness and a head gasket on an M104 engined W124.
The chassis have been around a loooong time and there are no real long-term quality issues. What with depreciation having nearly or maybe completely bottomed out, your only expense would be normal maintenance and repairs - and every car has these expenses.
And everyone that has read my threads on depreciation knows that it is the single largest expense in owning a car. Nothing else even comes close, but it rarely gets even passing consideration by most people when thinking about the cost of car ownership.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".