For Benzmac and Stve in FL : For the older MBs ie. W123s, what would type (DOT 3, 4, or 5) brake fluid would good garages put in a customers car ?

To all: Is there a brand of choice in brake fluid for MBs?

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David McDonald
1981 240D
1985 300D (wrecked)
1985 300TD 365,000 miles
1969 Mustang Fastback