Manfred- I think the whistle is caused by the headlight rims. If you put a bit of sponge rubber draught excluder around the top of the actual headlight so it’s under the rim when fitted, this whistle goes away - at least it did on my previous Plus4 and on my new Plus Four!!
Cheers!
Regards from Ireland

Last edited by Robbie; 21/03/21 12:41 PM.
Robbie
2021 Plus Four -- Helga
211-WX-1433

"Fettlebodge"--A chief of the PaddyMogs