changing coolant. s500 w140

[smoothcoupe]

i am going to change my coolant this weekend. i need to know if there is a drain plug, also is there a bleeding procedure. i may be changing the viscous as well any help on how to would be appreciated.

 

[BlackC55]

There is a drain bung on the radiator at the bottom.

Just fill up with 2-3 litres of coolant and top up with water.

Turn the heaters on.

Go for a drive for 5 mins

Top up level

Done.