I have had quite a few experiences with Road-side assistance too... and have always been more than satisfied (except one).
Two times I ran out of gas, and was refilled with 4 gallons!! Nice having a quarter tank for free! And on one of those times I ran out of gas, my battery died while waiting. Well it was a young guy, it was the middle of the night, and he had his girlfriend with him. My battery wouldn't recharge for some reason. So he gave me a brand new MB battery for FREEEE!! On the work order, he wrote that my car had 48,000 miles, and was a 97, making it still valid for MB warranty at the time.
Couldn't turn down that offer!
And my not so satisfied time was in Los Angeles. He jumped the car, and everything was fine in that respect, except he tried to charge me $45!! It took a few phone calls and a little *****ing to justify the free service! What a jerk, I reported that to MBUSA later on.
Anyways, been a great benefit to owning a Mercedes-Benz!