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SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Radio Antenna amplifier location?

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Old Aug 18, 2018 | 11:49 AM
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tcalef
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2004 SL500
Radio Antenna amplifier location?
Hi Everyone,

I've installed the Seicane unit in my 04 SL 500.. while not everything is perfect.. I'm actually pretty happy with the functionality.

I'm getting pretty horrible radio reception, and I'm thinking that I don't have the antenna amplifier working correctly. Everything seems wired right (wire from radio to power the amplifier is hooked up) and I got the right adapter to go from the antenna wire behind the dash to the radio. I'd like to find the antenna amplifier that combines the multiple antennas but I can't seem to find it. Behind the driver seat where the amp was is a harness that isn't hooked up to anything, which I'm wondering where it's supposed to go. Its a 25pin D-Sub connector.

Anyone have any idea where the amplifier is located? Even better, anyone solve this problem?
Thanks,
Tom
Last edited by tcalef; Aug 18, 2018 at 11:54 AM.
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Old Aug 19, 2018 | 12:57 PM
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The FM antenna amp is at the base of the A-pillar on the left side.
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Old Dec 31, 2018 | 01:23 PM
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SL500 R230 2003 160K Miles
I have same problem. Torn apart the trunk. Where is the A-Pillar.
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Old Dec 31, 2018 | 02:14 PM
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The A-pillar is at the front windshield.
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Old Dec 31, 2018 | 04:18 PM
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Sl500
Talked about this, a week or so ago, about the same problem.
Seicane, bad radio reception.
Seems to be a real Seicane problem.
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Old Dec 31, 2018 | 08:50 PM
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Originally Posted by Rudeney
The A-pillar is at the front windshield.

This the antenna harness supplied by Seicane. It has a Fakra connector for connecting the antenna. Cannot find where to plug it in
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Old Dec 31, 2018 | 08:51 PM
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Have not looked under left A-pillar (outside windshield)
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Old Dec 31, 2018 | 11:07 PM
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The antenna amp is right at the dash, under the inside trim on the A pillar. The antenna itself is embedded int he windshield.
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Old Jan 1, 2019 | 12:55 AM
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Think I can plug the fakra connector into it?
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Old Jan 1, 2019 | 10:53 AM
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I am guessing that is the intention of the Seicane, but I've never installed one.
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