Disclaimer: This is written for information purposes only.Β I take no responsibility forΒ any damage that may be caused by following the instructions written in this guide.

Eonon make some great, budget headunits that are packed with almost every feature you could want… and recently, they have started to add some new models to their range made specifically for the current generation of Vauxhall/Opel vehicles. They are designed to fit the car without requiring any modification or silly adapters, and they work perfectly with the car with minimal effort required to install it, compared to most headunits. The first time installation took me roughly 45 minutes with no assistance from anyone else.

For more information on these headunits, please click the links below. The only difference between the models is the facia colour.

Eonon D5103 (Charcoal Grey)
Eonon D5107 (Matt Chrome/Silver)
Eonon D5108 (Piano Black)

So, onto the fitting!

First up, we need to remove the old stereo. You can use a coat hanger or some nails, but trust me, I tried it and it’s not easy. You’re much better off buying the keys made to do the job, they’re only a fiver from Halfords. Click here to buy. Now I’ve written this guide about 3 months after buying the unit, so obviously I’m not removing the original stereo in the picture, but the process is identical for the standard CD30 πŸ™‚

Simply insert the keys into the 4 holes on the fascia until they click into position, then pull and the unit will come out:

Note Be aware that your standard head unit is paired to the display screen in the centre. This is a security feature that means you don’t need to enter a code to access the radio if it ever gets removed or the battery dies, but at the same time, you cannot fit it to any other car unless you take the original screen with it. If you’re planning on keeping your original display (which I’m assuming you are) but planning on selling on the old stereo, you must have it “divorced” from the car. This can be done via a Tech2 or VAUXCOM device. Any Vauxhall main dealer should be able to do this, if not, there are approved traders on Astra Owners Network scattered around the country who will be able to assist πŸ™‚

Now that the stereo is out, we need to remove the glovebox. This will assist with cable management later on during the installation process, but to give yourself a bit of space, it’s best to do it now. To do this, open up the glove box and you’ll see 4 screws, as labelled on the below photo.

These screws are a T20 torx size. Undo these 4 screws and put them somewhere safe so you don’t lose them (I’ve got a habit of losing these screws!) Once they’re out, give the glovebox a sharp tug and it’ll come straight out:

Make sure the glovebox is closed so that the light goes out, and then take off the plug from the light. This will completely release the glovebox and you can put it to one side until we’ve completed the installation

So now, you can grab all the cables that came with the Eonon. The first set of cables I’ve attached int he picture below deals with all the extra inputs for things like speakers, reversing cameras, aux inputs, etc. This block of cables does not affect the unit at all if it’s not connected, but you obviously won’t be able to use any of those features. To start with, I didn’t bother and it made fitting the unit a lot easier, but I then wanted to make use of the aux-in feature and will soon be buying a reversing camera which will need to be fitted here as well… So if you don’t need it, don’t fit it…

The next thing we’ll hook up is the main connector block. This is required for the unit to work. It deals with the speakers, all the power and the steering controls. The little red plastic box is a CANBUS decoder which allows it to talk to the rest of the car, thus allowing the steering wheel controls to work, and from what I can work out, it means it is able to write text to the centre display, although I’ve only ever seen it say “WELCOME!!!!”, and it seems a bit random how it does it…

This has one large quadlock on one end, which connects to the standard Vauxhall loom, and then it has two smaller blocks and 3 loose cables. The two smaller blocks connect to their corresponding sockets on the back of the head unit. They’re pretty obvious where they go.

The BRAKE cable should be connected to the handbrake so that it will turn off the screen when the handbrake is off while playing DVDs so that it doesn’t distract the driver… It can be wired up to an earth point to make it think the handbrake is permanently on… but even better than that, you can just not bother connecting it, and then turn off BRAKE DETECT in the head unit settings and it will completely ignore this cable.

The AMP cable should be used as a remote turn-on for an external amplifier, so if you don’t have one, then don’t worry about this.

The ANT-C cable is a bit of a tricky one. I’ve not yet completely worked this one out. I know it is for the aerial amplifier, and without it being connected, my FM radio signal is pants… The problem I’ve found so far though is that the Astra does have an aerial amplifier, but the connection for it on the back of my CD30 goes to a blank pin on the wiring loom, which would explain why this is loose and not going to the quadlock. Problem is, so far I’ve not found anywhere to connect it to, and I know a few other members on Astra Owners Network have had the same problem… It has been suggested by a member to discard the aerial adapter that comes with the unit and to buy one of these (click me) adapters, then connect it to the blue cable on the adapter… I’ve not tried it yet as I’m a cheapskate, but it may be worth a go.

So we should now be looking like this:

Next up, we will connect the GPS antenna. There is a gold and white connector between the aerial socket and the socket for all the aux-cables that is labelled GPS ANT. It’s a simple screw on coax connection so really simple to do. The GPS antenna that is supplied has a magnetic base plate, and running across the back of the dash behind the glovebox is a big metal pole. I’ve stuck the magnetic side to this pole, then run the cable through the side of the centre console into the stereo area, then conneted it to the head unit. Really simply to do:

If you want to use the USB connection or add anything to your aux block, this is probably the time to do it now. You can see the USB socket is next to the aux block.

Now we’re going to connect the stereo up to the car. So this is the quadlock that comes as standard on the car. As you can see, it’s designed in such a way that it’ll only go on one way, so you simply cannot get it wrong.

This connects to the big block on the Eonon’s loom:

Now we will connect up the aerial. The bigger end of the adapter that comes with the unit goes into the big circular socket next to the GPS antenna connection. The smaller end connects up to the white cable that is attached to the quadlock loom:

Now that is everything connected! All we need to do now is to fit the unit into the dashboard… which is the hardest part of the installation. Reason being, we now have to fit all this cable:

Into this small space:

This is where having the glovebox out comes in handy, as to the left hand side of the centre console, there is a big gap that you can access from the side of the stereo and the side of the glovebox. This is the perfect place to try and house as much cabling as possible. This is the gap:

If you’re careful enough, you can feed the majority of the cables through here and try to keep them nice and neat. This will give you a lot more space behind the unit, so you’ll find it’ll fit much flusher with less effort. If you don’t feed the cables round here, you’ll find you’re going to have a very, very hard time getting it to sit flush with the dash. As you can see here though, the cables do fit nice and tidily:

And the finished product! πŸ™‚