I carry a piece of pipe for a handle extension on the MB lug wrench, the MB tool kit, cell phone, AAA membership card, credit cards, and a large supply of cash.

I keep the maintenance up to date. In 30 years of driving MB cars, I have been stranded four times: lost a connecting rod bearing in a 240D, lost a front wheel bearing on a E320 at only 25,000 miles, spilled soda pop into the console shifter on an E320, and had a stuck front caliper on a 300SD which made a lot of smoke. AAA hauled all of these home for me and my cell phone was very useful. Supplies for road side repairs would not have helped.