TJack

Hi, My Mk3 superb had a noise similar to what you describe when sat on the motorway at about 65 - 70, like a buzzing noise I could swear was coming from the B pillar right next to the drivers right ear. After I stripped the B Pillar down thinkning it was something in the seatbelt etc I learnt that these noises can travel a long way through the car and it might not be coming from where you think. My issue was a fuel pipe which passes through a box section under the drivers side floor and resonates at certain speeds, VW have a service bulletin for it as it affected the Golfs as well SB-10069579-2280. There fix looks like basically rubber isolators stuffed into the box sections so the pipe doesn't touch the sides of the box section. I would presume this has been resolved on the MK4 but I'll mention it just in case it helps. If the fuel pipe isn't secured in the box section it can touch the sides. My fix was to pass cable ties in through the holes in the box section at a few intervals and hook around the fuel pipe so they tie it the bottom of the box section so it can't resonate and rattle around, it's been fine since 2022 now. SB-10069579-2280 Fuel Pipe TB.pdf Hope this helps.

I use a product called wet & forget around the place to kill algae on the patio, walls, convertible car roof, boat, boat covers, shed, bins etc. Basically I spray everything with algae down once a year I usually give them and any other green bits from parking under trees a quick spray on my way past. One spray leave it to dry, looks a bit like a local cats pee'd on it until you next wash it but resist washing it for a little while, they clear up over a few weeks or so and stay clear for a year or so. Certainly until I next wet & forget a year later. Saves taking them out. Not worth buying just for the fog lights but I use it anyway as it saves a load of jet washing on everything else. Not found anything that it damages yet.