Q: Hirschmann MCA 9

I have an Audi A4 with a combined roof atenna, (phone and radio)

The radio modus is not good.
I have measured:
- There is 12 V, it has negative ground.
- There is no connection between inner and outer core of the anttena wire to the radio.
- There is zero ohms from radio till feet of antenna.
- Removing Rod does influence!

Will the antenna foot died or have anyone a clue?

They are stick on connections for the combined Aeriel and rear de-mister, but I've never heard of a combine phone and radio, is that a factory fitted phone?

Yes it's factory option.

I've looked, the windows are not connected.
They look like the old VW golf 16 V antenna on the rear of the car.

[Edited on 5/1/08 by t.j.]example clicky

[Edited on 5/1/08 by t.j.]

Have you tried cleaning the rod thread as a ristance change would affect one signal more than the the other

hmm, nope. But I unscrewed it many times though

Can i measure something on the foot and antenna rod?

It's a standard fault that the antennafoot leaks and the amplifier inside corrodes...you need to switch the entire antenna...

(Did it 2005 on my 2002 Passat Wagon)

[Edited on 5/1/08 by falcor]

quote:

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Originally posted by falcor
It's a standard fault that the antennafoot leaks and the amplifier inside corrodes...you need to switch the entire antenna...

(Did it 2005 on my 2002 Passat Wagon)

[Edited on 5/1/08 by falcor]

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Over here in Sweden it cost me about 85€ to get it done at the local carstereo shop. Didn't ask what the stealership wanted for it...

It is a common problem and theyr not cheap from the dealer. My normal arial for my passat the dealer wanted 54 quid plus vat trade price just for the base so i hate to think how much a racey one like yours would be.

You could try here