Static fm and am after new pioneer radio install w211 - Mercedes-Benz Forum
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post #1 of 14 (permalink) Old 12-07-2018, 11:11 PM Thread Starter
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Static fm and am after new pioneer radio install w211

Hi I have a 2007 e350 w211 with fibre optic and have replaced command with pioneer z5150 by using aftermarket aerpro harness for plug and play.
Everything worked out great including steering wheel control except the reception of FM and Am , I know it has amplified antenna and have fitted an after market amplifier connected between the new pioneer and MB antenna plug and have powered up the new amplified antenna adaptor.
But Iím not getting a clear sound just a lot of static over the radio.
Iíve been searching forums and online for 3 weeks with no luck.
Does anyone have a suggestion for a fix.
Iíve also earthed the new amplified adaptor thinking it might have been the reason it wasnít working.
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post #2 of 14 (permalink) Old 12-08-2018, 05:39 AM
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Are you using the car's original antennas, or an add-on? If you added a 3rd party antenna amp inline with the car's built-in amp, you may be using way too much amplification.

Warren

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post #3 of 14 (permalink) Old 12-08-2018, 11:35 AM Thread Starter
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No Iím not using the original amp, as Iíve unplugged the antenna connection from the back of that amplifier and connected that onto my 5 metre ext from headunit to back of car, thatís where Iíve plugged in the new adaptor amp and powered it from one of the rear fuses next to original amp.
I notice if I hold onto the cable and move it around a little the reception seems a lot better , static seems to virtually disappear so I was thinking a ground problem somewhere so I earthed the new small amp but still no luck. Just as much static as without having any antenna plugged into it.
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post #4 of 14 (permalink) Old 12-08-2018, 11:49 AM Thread Starter
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Itís a little confusing as the original command unit did not have an antenna plugged into the back so Iím assuming it all ran thru from the rear via the fibre optics.
So when I checked in the rear of the car where I found Amp etc Iíve found the antenna connection into that rear Amplifier, So ive unplugged from there and attached it to my new mini amplified adaptor then along my 5 metre cable to the new head unit.


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Are you using the car's original antennas, or an add-on? If you added a 3rd party antenna amp inline with the car's built-in amp, you may be using way too much amplification.
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post #5 of 14 (permalink) Old 12-09-2018, 12:18 PM
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No I’m not using the original amp, as I’ve unplugged the antenna connection from the back of that amplifier and connected that onto my 5 metre ext from headunit to back of car, that’s where I’ve plugged in the new adaptor amp and powered it from one of the rear fuses next to original amp.
I notice if I hold onto the cable and move it around a little the reception seems a lot better , static seems to virtually disappear so I was thinking a ground problem somewhere so I earthed the new small amp but still no luck. Just as much static as without having any antenna plugged into it.
Is that with car running or not.. Your new amp maybe be picking up line noise from the fused line that your using.. Also,..You very well maybe over amping the RF.. Take a piece of wire about 3ft, attach it to the center conductor on the end extension cable..or if you have an old style bare fender mount antenna laying around, use it.. No amp in the line.. See what happens..
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post #6 of 14 (permalink) Old 12-09-2018, 02:12 PM Thread Starter
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Ok thanks
I have an old antenna thatís not amplified Iíll give that a try this afternoon.
I hadnít thought of trying an unamplified antenna.

The scratchy sound came regardless if car was running or off.

Fingers crossed this standard antenna does the trick.




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Is that with car running or not.. Your new amp maybe be picking up line noise from the fused line that your using.. Also,..You very well maybe over amping the RF.. Take a piece of wire about 3ft, attach it to the center conductor on the end extension cable..or if you have an old style bare fender mount antenna laying around, use it.. No amp in the line.. See what happens..
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post #7 of 14 (permalink) Old 12-09-2018, 07:45 PM Thread Starter
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Standard antenna is an improvement about 80% now still get static and inside garage no reception at all but itís definitely better but nowhere near as clear as command unit
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post #8 of 14 (permalink) Old 12-09-2018, 08:03 PM Thread Starter
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By standard antenna I meant an old car radio antenna

Not the w211ís amplified shark fin antenna

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Standard antenna is an improvement about 80% now still get static and inside garage no reception at all but itís definitely better but nowhere near as clear as command unit
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post #9 of 14 (permalink) Old 12-10-2018, 01:37 AM
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Standard antenna is an improvement about 80% now still get static and inside garage no reception at all but itís definitely better but nowhere near as clear as command unit
Not being familiar with either units,.. Have you checked to see if there is a "local/ distance" mode on your new Pioneer?.. No reception at all, is a symptom of a radio being in the "local" mode..
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post #10 of 14 (permalink) Old 12-10-2018, 04:19 PM
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Also.. that extension cable may not be the best of quality, with minimal shielding... You may be picking up the car's data streams.. Remove the head unit out the dash.. Plug in the straight antenna directly into the radio.. Dangle the antenna out your window, keeping it away from as much of the car frame as you can.. Play around with it.. does the noise come and go?.. If so, re-route extension and /or buy a better shielded cable..
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