The handbook shows clearly the 2 types of radio available, a standard radio and the one with the 6 CD player.
The latter can have EITHER an FM button or an FM/Digital button.
With the FM button fitted, is just that, FM
If it has a FM/Digital button, the handbook refers to FM/DAB.
I too have the 2 different aerials in the read windows and a 10amp fuse in the Digital position in the rear fuse box.
Some free legal advice follows.
I presume (a) you purchased the car from a dealer and (b)you paid cash on a part exchange may be but cash went from you to the dealer. If it was HP or credit sale other statutory protection comes into play via the Consumer Credit Act which broadly equates to the following which relates purely to the sale of goods..
Basically, even if you purchased your car and it was second hand you can claim against the dealer for goods which are not of satifactory quality. In a nutshell you can repudiate the goods and get your money back without deduction. Since a defective radio is not equivalent to a duff car what can you do? Well the first thing is to take it back to the dealer (provided it is not a private sale)and say fix it, as the radio was duff, when purchased. He may invite you to go forth and mutiply at which point you say that part of the goods sold were not of a satisfactory quality but you are treating the sale of the car with the radio defect as a breach of warranty and claim damages in the small claims court for a breach of section 14(2) and/or possibly Section 14 (3) of the Sale of Goods Act 1979 .The damages claimed will be the cost of a replacement radio if it can't be fixed. Small claims courts usually means even if the dealer wins his case he is unlikely to get all of his costs back. In a nutshell it's going to cost him whatever and certainly time and if he has a brain he might realise this.Many of course bull**** on the basis you will go away. Now, there is also the possibility that the car was sold and reference was made to the digital radio in the sales blurb. If so, good show, because you can then say that the car was purchased and the price asked paid on the basis of how it was described and if it was sold with a digital radio by implication( if not actually expressly stated) this means a radio that actually works.This is then subject to section 13 of the Sale of Goods Act and treated as breach of contract giving rise to damages as a remedy on the basis there was a failure to accurately describe the goods. If he sold the car directly to you then he is responsible as you are in contract with him--not Land Rover.It is up to him to seek redress from land Rover not you.