I was about to drain and flush my newly acquired W124 (300TD) but I can't find the radiator drain. The radiator in thisTD has the tanks on the sides of the radiator. Is this the correct style for this chassis? If so, where is the drain?

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member