Man, you have awfully bad luck.
Just keep looking - you'll find one.
Remember to look at cars that have long records of regular maintenance. Don't take their word for it, insist on examaning and taking home the hard copies of the actual receipts.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".