Bearing diagram for crankshaft - AH03.20-P-4351-01AL
WARNING: This page does not describe the selected car, but rather 199 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 640
The oil grooves (arrows) in the thrust plates (3, 4) must point toward the thrust collars of the crankshaft. Moisten bearing shells (2, 5) with engine oil before inserting the crankshaft (1).
The thrust plates (3) each have a retaining lug as an anti-twist lock in the crankshaft bearing caps. Check that anti-twist locks are correctly seated.