If you really want to go bankrupt in a flash, go for an S 600
My S 500 L easily triples or cuadruples my E 320 T maintenance bills (including gas costs). And we are talking regular maintenance, when something goes wrong with the V140, it really goes over five to six times the cost it would take to fix the same thing on the S124.
Believe me, there certain little gizmos that will drive you crazy on an S 600, like a peculiar computer module that monitors tire inflation values. If the any tire pressure falls below 30% of its acceptable ratio, the engine will limit itself to 3,000 r.p.m. (at least the euro version has this gadget, which prevents the driver the blast the car at high speeds on the autobahn).
CL 500, 1998
S 500 L, 1998
E 320 T, 1995