Some differences highlighting the details in the interior quality impressions:
1) Rear armrest cupholders:
Mercedes W214 E-class - retractable from inside armrest.
BMW G60 5-series - not covered and on top of armrest. Looks way cheaper.
2) Rear Climate Controls and Vents/Seat backs:
Mercedes W214 E-class - Has full 4 zone climate control with separation for temperature control, fan speed and air distribution. Air vents have some chrome inserts. Front Seat backs have airplane style storage pull downs.
BMW G60 5-series - Not full 4-zone climate control- Has separation only for temperature control, but fan speed and air distribution not separated. No chrome or metallic inserts on rear vents. No storage area behind the front seat backs.
3) Rear Doors and trim:
Mercedes W214 E-class - Has metallic silver handle surrounded by ugly shiny piano black trim. Has classy looking silver metallic speaker cover and metallic grab handle. Relatively large door pocket. Stitched upper door panel and armrest.
BMW G60 5-series - Has metallic bronze door handle with thin matching bronze trim piece that looks classy. Classy looking Metallic bronze coloured speaker cover. No grab handle, but recess is inside the door armrest. Very small door pocket. Upper door panel not stitched but armrest is stitched.
4)_ Front driver door storage area and trim:
Mercedes W214 E-class - Relatively large storage area with felt lining. Silver metallic door handle, electric seat control, electric window switches and classy speaker cover. Use of ugly shiny black piano trim. Upper stitched door panel and armrest. Ambient lighting strip on top door panel.
BMW G60 5-series - Very small storage area with no felt lining. Classy Bronze metallic door handles and thin trim strips. Some nice matching wood trim on top edge of door. Black mesh speaker covering. Black plastic electric window switches. Upper door panel not stitched but armrest stitched. Ambient lighting crystal trim strip on top door panel.