I want to discover the cause of a rattle in the rear trim surrounding the top tailgate. Can't be hard.
Its the grab handle part, the lower trim as shown here:

Click image to enlarge

nobody got a clue??

 Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top
1998 90 TUL FFR Hard Top XD Wolf
1993 90 Tdi

*Gone: L405 4.4 VSE, L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

Based on clips it looks like it just pulls off? Present :2008 TDV8 HSE
Gone Audi A5 2.7TDI
Gone Discovery 3 HSE
Gone Mercedes CLK
Gone Range Rover 2.5 DSE

^ It does indeed Carefully.

What I want to do is once it's off, the stick the thick sound deadening material I have left over from doing the Defender, to stop the plastic resonating so much. Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top
1998 90 TUL FFR Hard Top XD Wolf
1993 90 Tdi

*Gone: L405 4.4 VSE, L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

It's off! Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top
1998 90 TUL FFR Hard Top XD Wolf
1993 90 Tdi

*Gone: L405 4.4 VSE, L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

So, with a modicum of effort I removed the trim panel and cleaned up the inside, then used leftovers from sound deadening my Defender, it's a sticky black thick foam with aluminium backing. It's very dense so absorbs panel rattle.

These plastic trims are so hollow and flimsy, it's no wonder they rattle over bumps and you get resonating plastic noises.

I filled the inside with the material then for good measure used a block of foam I had and cut some wedges, so that when it was put back together the air gap was also taken up. Then I used aluminium tape to seal between the material pieces too, neatens it up a bit.

Each tailgate light has a pathetic piece of foam surround and this is supposed to keep the panel from touching metal and resonating. It's not enough.

I also poked foam inside the side trims as you can see from my pics down below.

It ain't a pretty solution, but it works.  Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top
1998 90 TUL FFR Hard Top XD Wolf
1993 90 Tdi

*Gone: L405 4.4 VSE, L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

Foamtastic job  Present :2008 TDV8 HSE
Gone Audi A5 2.7TDI
Gone Discovery 3 HSE
Gone Mercedes CLK
Gone Range Rover 2.5 DSE