Notes on coolant level - AH20.00-P-1142-01PI
WARNING: This page does not describe the selected car, but rather 203 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz S65 AMG, and 2020 Mercedes-Benz GLA250. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE 156, 272, 273, 642 in MODEL 209
ENGINE 272, 642 in MODEL 203
The coolant level on a cold engine must reach up to the marking (arrow) on the coolant expansion reservoir.
For warm coolant the coolant level is about 1 cm above the marking (arrow).