I like the idea, but never got around to it. My benz had 475 thousand original miles and power train. THe trunk was rusted out and the passenger side door was dificult to shut unless you lifted it. Both front seat frames were partlly rusted through the floor as the fire wall leaked and a few body drains or plugs were plugged. It served my father well and he parked it for a year before he gave it to me. I drove it 6 months and had to use the little grey bottle of stuff and starter fluid to start it up. Frankly the last week I owned that car I left it running as to start it took 15 minutes. Nothing like seeing smoke out the back, oil psi, but the engine wont catch. I feared using too much starter fluid would screw up the engine.
Having said that I was fine getting 32 mpg in a full size sedan that kept up with traffic on i95.