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Becker Mexico Cassette '77 Bluetooth Upgrade

Started by Alex, 02 May 2024, 08:10 PM

Alex

So I have a '77 280SE (Aus Delivered) with the factory Becker Mexico.
The Mexico is thankfully, fully functional with all seeking AM/FM functions working and cassette functionality.

However, I still want to have the option for bluetooth functionality on a switch (or automated one).

I did find this:
https://www.ebay.com/itm/294723236823?itmmeta=01HWXX4Z29Y6CKG3GZYP5XJGW2&hash=item449edfb3d7:g:cXUAAOSwk2lfnFZ8

And other similar ones that use the 7-8 pin connector at the rear of the stereo. Do they work through this connector only? How does this connector work? From my understanding- this connector allows me to connect an audio input midway after the stereo and before the amp. This should retain functionality for the original radio.

TLDR:
Anyone got experience with upgrading bluetooth onto the Becker Mexico? Or experience with any of the other aftermarket bluetooth adapters using the 7-8pin adapter at the rear of the stereo?

Cheers.

mrkozzy

Same thought process.
Following this article with interest.
MrKozzy

ptashek

No personal experience here, but looking at the schematic I have on file for the Becker, your understanding seems right. The socket hooks right into the amplifier stage, and is described as "socket for record player or cassette recorder (stereo)". The adapter I'm guessing simply decodes the digital Bluetooth audio into an analog stereo audio input for the amp.
1993 "Pearl Blue" W124 280TE
1988 "Arctic White" W124 200T
1979 "Icon Gold" W116 450SE

Alex

Welcome gents, I have since received a reply from the owner of the company roughly explaining the device. (For the Becker Mexico Cassette - It may be different for a Europa or other systems.)

Here is the purchase link:
https://www.ebay.com/itm/265827133506?itmmeta=01HWZHKTV7NSHSTAX7VRM9PYPY&hash=item3de4882842:g:v9MAAOSw~dZhnXnK

So this one should plug into the rear "Din" port for control, the radio functions as normal until sound is played through bluetooth.

As far as I'm concerned it works through a relay, which switches off when your phone disconnects or the volume is down.

I am still contacting the guy to find out whether or not the volume is controlled through the original volume knob or the phone.

Shall update when I find out.

Max-NL

Volume should be controlled through the radio, as the accessories which used that connection (external cassette player, trafic decoder) do not have volume control. This is handled via the radio.
1971 R107 350 SL
1972 W108 280 SEL 3.5
1975 W116 280 S
1975 W116 450 SEL 6.9 #140
1977 W123 230
1992 W124 230 CE
2001 Ducati Monster S4

nathan

before any solutions were available, I decided to devise the most complicated way humanly possible to have bluetooth and hands free powered by my Becker. behold!
https://www.youtube.com/watch?v=iSOtJ-sal5E&t=9s
1979 116 6.9 #6436
2018 213 e63
2011 212 e63
2011 463 g55
2007 211 e500 wagen
1995 124 e320 cabriolet
1983 460 300gd
1981 123 280te

Alex

Quote from: Max-NL on 06 May 2024, 05:49 AMVolume should be controlled through the radio, as the accessories which used that connection (external cassette player, trafic decoder) do not have volume control. This is handled via the radio.

Yeah can confirm through a second source that this is the case, so that's good.

--------------------------------------------

Quote from: nathan on 06 May 2024, 08:44 AMbefore any solutions were available, I decided to devise the most complicated way humanly possible to have bluetooth and hands free powered by my Becker. behold!
https://www.youtube.com/watch?v=iSOtJ-sal5E&t=9s

That's you!?!?

I saw that in my research. Fantastic job mate. My soldering skills are still, ok- at best.
I may try the off-the-shelf solution and report back.