LEDs arrived today from Bevinsee for the D3S headlamp and H7 high beams.

I'm familiar with replacing the D3S in-situ (insert first, then connect the plug), but haven't any experience with the high beam H7's. Is there a similar order of operations trick to them? (And is there a retainer clip?)

Click image to enlarge

I've just put some H7 LED's in mine and they just pull out. Just make sure the 'tang' on the bulb is pointing down so that it fits in the slot of the bulb holder and that none of the wires get in the way to seat it properly.
Look through the headlamp to see the position of the old bulbs first before taking them out because when you put the new bulb in it never feels as though it seated properly in my experience.
I found it easier to have the power lead connected to the bulb before fitting.

Push fit only. No need to turn it. As above, line up the tab.
I noticed the LED is at an angle when looking from the front but no impact on performance.
Enjoy a brighter life with your new bulbs  Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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Can't remember any issues fitting mine as they have the same fitting. 2012 TDV8 Vogue (L322)