C32 AMG, C55 AMG (W203) 2001 - 2007

2002 C230K Coupe (W203, US): need diagram on where ATA, antenna amp + wires are

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Old Feb 12, 2025 | 02:31 PM
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From: southeast, US
2002 C230K (W203) stock
2002 C230K Coupe (W203, US): need diagram on where ATA, antenna amp + wires are

Hi,
Per the subject line I need a diagram on where the ATA, antenna amp + wires are to determine where a short is tripping fuse#8.

Why? I have been attempting to troubleshoot an issue with remote lock/unlock & have narrowed it down to something keeps blowing fuse #8.

I already tried searching the forum & while there are many posts on this, none have any diagrams showing *where* these components + wire runs are.

The closest post I found to my situation was https://mbworld.org/forums/c32-amg-c55-amg-w203/516344-keyless-entry-not-working-not-antenna-amp.html but that was from 2013 & sadly no one has replied to my (necro)post on it 😔

My understanding is if fuse #8 keeps blowing, it usually means one (or more?) or the ATA(s?) sirens or antenna amplifier or wires to these components are shorting.

Based on the component location descriptions I managed to remove a 2x0.5’ long (fragile) ABS plastic piece on the underside of the trunk hatch only to find… nothing but two star screws 😞

Because everything is so fragile now, & to avoid removing irrelevant panels, could someone post like an exploded diagram perhaps?

Thanks!

PS: car is stock, no mods!

Last edited by blacknova2; Feb 12, 2025 at 03:20 PM.
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Old Feb 12, 2025 | 03:26 PM
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It’s usually the alarm siren that is located behind the passenger front wheel . Yiu can disconnect it from underneath, the battery goes bad and shorts out the circuit board and blows the fuse.
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Old Feb 13, 2025 | 04:01 PM
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C55 AMG T with Kleemann K2 and some stuff: 414 hp and 562 Nm :-)
Hi,

I have a 5-door C55 and a (very) long time ago I had a problem with both remote locking and poor radio reception.
To open the car I had to use the infrared signal at the drivers doorhandle, instead of remote opening.
The problem lied in the antenna amplifier which was broken due to a water-leak. It was, if I remeber correctly,
situated at the top of the trunk above the window, where a telephone-antenna also sits. Water obviously came
in via the top spoiler and ruined the aplifier. Worth noting the alarm siren was changed too.

I don´t know if this helps you with your coupe. Good luck anyway!
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Old Feb 13, 2025 | 06:39 PM
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From: southeast, US
2002 C230K (W203) stock
Originally Posted by cdk4219
It’s usually the alarm siren that is located behind the passenger front wheel . Yiu can disconnect it from underneath, the battery goes bad and shorts out the circuit board and blows the fuse.
Thanks. When you say “underneath”, I assume you mean from the wheel well? Also, what does the siren look like? FWIW, I notice that the siren nor lights activate when I open the car with my key (in the past doing this would trigger the alarm)
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Old Feb 13, 2025 | 06:44 PM
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From: southeast, US
2002 C230K (W203) stock
2002_MB_C230K_electrical_antenna_parts_illust  ration
2002_MB_C230K_electrical_antenna_parts_illustratio n
I managed to find an exploded diagram for my model but it’s still very vague (see attached), ie: is the amplifier located *in* the glued headliner? If so, how did you get to it w/o destroying it in the process?
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Old Feb 13, 2025 | 06:52 PM
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C55 AMG T with Kleemann K2 and some stuff: 414 hp and 562 Nm :-)
Open the back lid and you´ll find it behind some plastic.
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