I'm all of a sudden getting very bad AM reception. My FM reception still seems OK. The dealer replaced the antenna amplifier 2.5 years ago under warranty when a similar problem occured.

Is it most likely the same thing again? Do these things break that easily? Where is it located? How easy/difficult and costly is it to replace? Should there be any warranty on the part the dealer previsously replaced?

Any help would be greatly appreciated!

Thanks

This must be a known problem. On my 99 ML430 the antenna amp was also changed under warranty a few years ago.

I have been having the dealer service this vehicle, and each time they do, they clean the antenna ground. It fixes the problem for a year. This has been done as a courtesy repair at no charge. A few weeks ago, they tested the antenna amp but found it OK.

I'll probably stop having the vehicle serviced by the dealer, so I'll be looking for the self repair procedure.

Hope this helps.
Al