Another bad FM reception thread - MBWorld.org Forums

Nov 11, 2011 | 01:52 PM

KevinL

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Another bad FM reception thread

After a recent service on my ML350 I re-entered my radio pin and found I had poor FM reception. Could be coincidence but I am unsure. All that I did to the car was change a relay for the fans under the hood.

CD works fine but FM can not find stations when scanning and if I pick a station volume is very low. I understand it could be the Antenna or maybe an amplifier? Logic suggests antenna to me. So my questions are....

What should I do to trouble shoot?

Where is the antenna located?

Is it in the rear bumber (I have bumper cracks and a hole) or the rear window?

Miss my radio as I use the FM with a bluetooth transmitter for hands free (And Pandora from the iphone)

If it is a big hot mess to fix is their an aftermarket that will fit in and offer bluetooth or at least an aux port? with Nav of course as I have it now...

Thanks for any help you can porovide

Kevin

Nov 12, 2011 | 08:08 AM

KevinL

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From time to time the radio comes back up to full volume for a second or two... Like a short.....

Nov 14, 2011 | 10:06 AM

BryanW203

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How many miles, I say either amplifier of a short in the antenna wire where is goes from the car to the hatch.

Nov 30, 2011 | 10:19 AM

KevinL

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Thanks Bryan,

Cd and Nav have full sound. Is there a diagram of where the antenna wire runs available?

Kevin

Dec 1, 2011 | 03:31 PM

Maj. Dundee

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From: Bronx, N.Y.

2002 ML 320 & 2006 ML500

Quote:

Originally Posted by KevinL

Thanks Bryan,

Cd and Nav have full sound. Is there a diagram of where the antenna wire runs available?

Kevin

Tha AM/FM antenna is in the tailgate, but your problem is probably a partially broken coax cable in the upper right corner or the tailgate.

Attached Thumbnails

Another bad FM reception thread-2011-12-01_152452.jpg

Attached Files

Antenna, Radio.pdf.pdf (19.3 KB, 1309 views)

R&I Tailgate Liner.pdf (263.5 KB, 1187 views)

Dec 2, 2011 | 02:45 PM

KevinL

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Thanks for the info. I will post a pic of my tailgate, looks a little different unless your posted picture does not show a cover wrap on the wires. What should I look for?

Dec 2, 2011 | 10:24 PM

Maj. Dundee

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From: Bronx, N.Y.

2002 ML 320 & 2006 ML500

Quote:

Originally Posted by KevinL

Thanks for the info. I will post a pic of my tailgate, looks a little different unless your posted picture does not show a cover wrap on the wires. What should I look for?

You will have to remove the wire loom to reveal the coax cable. Look at the point where the cable takes a bend. If it isn't obvious, you will have to manipulate the cable while the radio is on to check for returning reception.

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