Drain plug location M102?
 

Hi folks
I am planning to replace the coolant in my 82 200 this weekend since it began to be reallly cold here.

Question is: Where is the block drain plug located on a M102 engine?

Last winter i just drained the radiator via the plastic plug and added antifreeze to top up it only got 4 or 5 liters and owners manual says
"Coolant Capacity = 8,5 liters".

This time i want to do it the "Mercedes way" accordig to the manual and drain every drop of that 8,5 liters.

thanx in advance

Block drain is just below the aluminum motor support arm...should be a 19MM hex plug.

Driver or passenger side?
19mm? Will any socket work or a special one needed?