similar to first post - I was very surprised when I bought my wagon 5 years ago that the are no child proof door locks on the back doors. I was told the reason was MB wants everone to have the option of opening the door in the event of an emergency.
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (194,000)
1999 E300 Turbodiesel (244,000 miles, dies at 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles)
2011 Audi A4 Avant (129,000 miles) hate this car!
BMW 330 xi 6 speed manual (100,034 miles)