Today was a good day - I successfully installed the Conti in my 1991 500SL. Everything seems to be working properly.
I bought the car last year with an old tape-decked Alpine unit installed (with CD), and I wanted it out of there after discovering the Conti on these pages, which handles bluetooth and more aesthetically pleasing.
My car's OEM unit should've been a Becker Grand Prix 1432, according to the Black Forest Becker Radio history page
The Conti was purchased via eBay Germany, and arrived within two weeks (ECS Tuning
now sells it as well). As the Alpine had a non-ISO connector, I had to source the correct ISO connectors to fit the Conti, from Amazon
Here are the wiring connections:
Battery (constant power): Car (Red/White) to Conti/ISO (Red)
Ignition (switched power): Car (Blue/Black) to Conti/ISO (Yellow)
Ground: Car (Brown) to Conti/ISO (Black)
Antenna: Car (Blue) to Conti/ISO (Blue)
Illumination: Car (Grey/Purple x 2) to Conti/ISO (Orange)
Speaker wiring colors are the same for both Car and Conti/ISO.
The Conti does not use the car's existing amp, so it doesn't have an "amp" connection (Blue/White on car). The only other port is that for the antenna, which also comes with a modern smaller-apertured adapter - this can be pulled out of the Conti unit to expose a larger diam. socket, into which my existing antenna male plug fit.
I ran the included MIC and sticky-padded it to the lower side of my instrument cluster, to the left of the center console.
WIth everything plugged in, the Conti (the unit sitting in its aluminum chassis) slid nicely and snuggly into the corresponding slot in the car.
By the way, I used Posi-Products wire connectors
, which made the job much easier.
The radio looks great in the center console; it looks period-correct in the daytime, and the yellow display lighting at night matches my center console and instrument panel lights nicely. 5-stars here.
Bluetooth was easy to set up for my Nexus 5 Android phone. The phone's Bluetooth detected the radio right away, and the pairing code that worked was “1234”.
The music sound quality is quite good, with the Conti's internal amp able to drive the stock speakers well enough for casual listening. The Conti has an adjustable equalizer, but I found its presets for "Pop", "Classical", "Rock", and "Jazz" more user-friendly. I chose "Rock".
When dialing a call from my phone, the text “Dialing…” appeared on the Conti’s display panel. The call connected without drama, and I could hear my wife on the other end through the speakers, though her voice volume was a bit low; I didn’t get a chance to adjust with the volume knob as I was busy driving. Also, my wife claimed that she couldn’t hear me too well, and this was after I had turned off the climate control unit to cut down on ambient noise; I may have to move the microphone higher and closer to my head. I don’t think that the “built-in” mike will cut it, where it’s currently situated.
Radio comes on/off when I turn the engine on/off - perfect. When the radio turns on, the antenna automatically rises (even in Bluetooth mode), and drops when the radio is turned off. When I turn off the radio in BT mode, it retains the BT mode next time I turn it back on.
Aside from a possible phone-volume issue, I’m quite satisfied with the Conti - it does everything that I ask it to, and more.