Oil types are designed to be interchangeable, as long as they meet the same MB Spec Sheet.
The car manufacturer expects that most people won't even know what brand of oil the dealer used during the last service. If drivers need to top-up, they can buy any oil with the correct MB Spec Sheet and just add it to the engine.
mercedes E320 cdi sport ,vw Tiguan R line , M B cls , bmw convertible
Thanks Renault12ts on reading your link I see there’s not much difference and considering I change every 5-6000 mls the think the
5 W 40 will be fine. and I have now learnt the W stands for winter.