Just go to your MB dealer and ask for MB coolant. It should come in a bottle with the MB logo, part number (Q 1003 0002) and other nomenclature on it.

You might want to check the following threads though:

http://www.peachparts.com/shopforum/showthread.php?threadid=18872

http://www.peachparts.com/shopforum/showthread.php?threadid=14348&highlight=coolant+part+number

http://www.peachparts.com/shopforum/showthread.php?threadid=12636&highlight=coolant+part+number

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93 500E, 43k mi, Pics of upgrade parts
Evo II Wheels on Dunlop FM901 235/45x17s
94 Facelift
RennTech CF Airbox
RennTech ASR Defeat
RennTech Chip
1st Gear Start
97 Range Rover 4.6 HSE Vitesse, Yellow, "Tonka" (sold)