Delay on FM radio at drive-in cinema

[Clix]

Hi, I have a Mercedes EQC 400 and a couple of days ago went to a drive-in cinema. It was frustrating to watch because for some weird reason the audio was delayed like half a second. Other cars were fine. It was simply tuned in to a FM frequency via the in-car system.

Why would this happen and is there anyway to get around it?

Thanks

 

[bluesl]

If you have any surround sound type processing active, it may be the sound is delayed for processing and to create the spacial effects. I'd recommend you switch all that off including things like dolby, dts, whatever else you might have.