Well today my greatest nightmare came to life. The low coolant light came on in my om603 car that still has the #14 head!! Ive never hit the hazards and whiped over to the side of the road so fast in my life I'm going to not sleep for a few days until I get this all figured out. When looking in the expansion tank I could hardly see any coolant, but there was a tiny bit in there. Well I called Roy to see what coolant I needed to get for the car and he suggested adding water until I could find the correct MB fluid for the car.(all auto zone has these day is the sketchy "mix with any" stuff) so here is my question:

-the Mercedes dealership says they only carry one type of coolant but didnt say what it was, is this going to be the right stuff? I'm assuming it's what they put in all the new stuff...
I know I'm looking for g-05 based on what Roy told me.
Ps. I really am great full that I have this forum to turn to when I am in need of help. (thanks Roy)

Additional info:
The car has never ran above 80c unless the ambient temps are in the 90's and the ac is on in traffic at which point the needle rises just a bit above 80c but is still touching it...

I'm going to do a pressure check on the system once I have new coolant to see where the leaks are if there are any.

I plan on doing a complete flush just for my piece of mind.

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1987 300D(Erma)- #14 head, 193k
2003 TDI Beetle sold
1985 300sd sold
1987 300D(Ursala)- #14 head, 157k when sold
1987 300D(Wilbur)- #14head, 356,000+miles, sold after 7 days of owning it.
1992mercedes 300d- totaled and in a junk yard somewhere..
1983 mercedes 300sd- scrapped
1980 mercedes 300sd first mercedes diesel-sold