If you think you're spending too much money and time in your car, you probably either need to get rid of your to find a nice W123 or W124 in great mechanical and cosmetic condition, or get something newer. I've heard that a lot of people who own old MBs also have Hondas, because Hondas are reliable too. Parts are cheap and they get good MPG (if only we could get that diesel Accord over here, sigh...) But for me, I know it's time for a new car when...
10. smog watch is issued when you start up
9. you have to put up a missing poster for your rear bumper
8. you lose in a race with that homeless guy and his shopping cart
7. you have a lifeguard in the trunk because so much water gets in
6. you tell people when getting in, watch your step, one false move and you can fall under the car
5. your 455 a/c system breaks down
4. you tell your passengers to put down their windows and hold some old pants with the legs tied up out of the window when approaching a red light or stop sign
3. you accidently hit a pothole, and the whole car falls apart
2. the duct tape needs duct tape to keep it together
AND the NUMBER ONE REASON to get a new car is...
1. Some guy asks, hey, how much you want for that parts car!

:p
-Joe