I recently swapped by B7 Avant 2.0 tdi for a B8 A5 Sport coupe which I love but as usual with an older car there's a couple of niggles. The rear 12v socket (for the back seats) works fine, but the front two don't. I checked the fuse and the fuse to the cigarette lighter (the one in the ashtray) was blown. I replaced it and that one started working, but I had to wiggle the USB charger about a bit whereas in the rear and my old car it worked in any position. The fuse for the arm rest socket was fine but I changed it anyway - this one still doesn't work. Are these sockets just a bit temperamental or could they need replaced? If so was thinking about replacing them with these maybe https://uk.rs-online.com/web/p/prod...VUrnACh03OQUAEAQYASABEgJwcvD_BwE&gclsrc=aw.ds Can that be done fairly easily or does the whole interior need to come out? Is there a way to test them with a multimeter?