Have started to notice wind noise when driving my 300 TE at freeway speed. Seems to be coming from the seal on the driver's window. OTOH, am not sure if this noise is completely normal and I'm hearing it because I've had the music down often enough recently to notice it.
In the event that it does need replacing, first how to test for it? Second, how to replace it. Is this something a mere mortal can do or should I have my service shop do it?
Many thanks, as always