The Shell ATF-134 has been around for quite awhile & was originally recommended by M-B on their fluid bulletin. Used to be the fluid for the original fill on transmissions at the factory. (see attached spec sheets)

I also agree with zip439 regarding the Pentosin product. Can't go wrong with their products. You can also use the Pentosin 1 LV fluid, which was developed to cover the M-B specs for the Crossfire 5-speed automatic.

I've also used the Pentosin DOT4 brake fluid when I installed SS brake lines & flushed the system on my 2007 Coupe.