Good point: the actuator goes through the door switch assembly so for example door lock won't work if the door switch is removed for any reason. So, for testing purposes you need to attach the door switch assembly. I do that outside of the door panel before reassembly.

Also: for for and finish there is some finesse with the DHC for sure. It has a convex surface that mates with a concave surface of the door inside. I like to leave the screws both quite loose and wiggle the part until it finds the "fingerprint" of th door.

Be very careful witg non OEM parts. The spring has less than two mm clearance to the window glass and I've put in DHC that the spring actually scraped on the glass. I cut the end to fit but it's a warning. You can. See pic where I mentioned the fix. I think in my awr-fix dhc thread

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)