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DND Services Ltd :: Database :: Decode - Workshop Service :: Vauxhall CD 70

Vauxhall CD 70
383555646 / 13 188 477
Vauxhall CD 70 Radio Code & Decoding Service

Vauxhall CD 70
13 188 477
SiemensVDO 383555646

As originally fitted to :

Opel / Vauxhall
Astra 2006

This Navigation System is designed to fit Vauxhall vehicles that utilise a separate colour display on the dashboard. It cannot be used in other vehicles that do not have this separate display fitted. If your stereo says "DISPLAY SAFE" or "RADIO SAFE" or you have a beep every few seconds, then the radio requires complex programming to the car.

This range of Radios fitted by General Motors causes more confusion than any other that we have encountered, so before we continue, lets explain a few truths and dispel a few myths.

This is quite a popular stereo to find on the net, but many are described as having codes with them which is very misleading and incorrect, as this unit does not actually require a code. If you own a late model Vauxhall or Opel, then you may be familiar with the CARPASS that shows the "Unlock" or "PUK" code used for vehicle diagnostics and programming, and it is often this vehicle specific code number that is mistakenly described when people are advertising their radio for sale. This 4 digit number is unique to the vehicle, not the radio, and will not allow the radio to be used in anything other than the original car.

You will often hear the term "Married" radio, and this is because the stereo is programmed with encrypted data that will only allow it to communicate with the original vehicle and no other. The equipment used to program the stereo and the car together is called a Tech2 programmer. The Tech2 plugs into the diagnostic socket of the car and can then be used to perform various programming routines, one of which is to allow the radio and car to communicate with each other.

But this is where it gets problematic. At the time of writing, 99.9% of the Tech2 programmers, (and that includes virtually all of the Main Dealer Opel /Vauxhall OEM diagnostic equipment) are unable to reprogram any radio that has previously been fitted to another vehicle, as the radios, (as far as Tech2 is concerned) are supplied and programmed as a "write once only" operation. In order to remove the radio from the original car and use it in another, then a very strict removal procedure needs to be followed and under no circumstances should the radio simply be removed using a cheap set of removal keys without first plugging in the Tech2 and wiping the memory of the radio. In other words, in order to remove it from the original car, it has to be de-programmed first, not simply pulled out. The correct removal procedure is called "Divorcing" and this must be done whilst still in the original car as Tech2 cannot divorce a radio once it has been removed. If a radio has not been correctly divorced, then Tech2 cannot program for use in another car. If your radio has been correctly “Divorced”, then you will have no problems in getting someone with a Tech2 to program this into your new car using your unique vehicle PUK code located on your CARPASS. If you do not have a CARPASS, then you will have to apply for this via the Main Dealership.


Some of the second hand radios currently being offered for sale by various breakers yards and internet auction sites are being supplied “Un-Divorced” with the display from the original car as a Married pair with the comments that these can be used in your car without the need for any further Tech2 programming. There is an element of truth to this, as they will indeed power up, but introducing a radio and display to your car without the correct programming has some exceptionally expensive consequences that we are now starting to see on an alarming basis. The problem here is that the Radio and display still retain the identity and PUK code of the original vehicle, and when installed into a new car you will now have two vehicle identities communicating across all of the vehicle ECU`s and it is not uncommon for one to overwrite the other and corrupt the entire vehicles electronics. Once an ECU has been corrupted, Tech2 cannot recover it from that state and a new ECU(s) will be required. Replacement of an engine ECU and a Gearbox ECU can easily run into four figures – and all because a short cut was taken when fitting a radio. You have been warned.

So what can we do for you?

If you have obtained a second hand radio from eBay or a breakers yard, that has been incorrectly removed, not properly divorced, and displays “DISPLAY SAFE” or “RADIO SAFE” , then you must have the radio reset and reprogrammed by a specialist such as ourselves before you can re-use it.

We can to reset this unit back into "Delivery Mode" allowing it to be reprogrammed into your new car with a Tech2, but you will need to send the unit to our workshop for this work to be carried out. Approx turnaround time is 48 hours from receipt to dispatch.

Please be aware that once you have used our service to reset your stereo back into "Delivery Mode", you will still need to enlist the services of a Vauxhall / Opel Main Dealer or Independent Specialist with a Tech2 programmer to then program the radio into your new vehicle.

This model does not have a code number
It is programmed to the car using Tech2


Code Number Recovery :

(€ 48.70)


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8th February 2024
NI & the Windsor Framework

With regret, we are still unable to ship anything to Northern Ireland at this time due to the excessive paperwork required.

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