Possible new owner - 2006 X5 4.4i Sport

[champ_21]

Hi everyone,
I am in the market for a 2006 X5 4.4i. I've found a CPO at a local and very reputable BMW dealership. It has just about every option I am looking for, with the exception of GPS/Navigation and Premium Hi-Fi w/DSP. These two options are very important for me to have. I asked the dealer if they could be installed in the X5 once I purchase it and was told that this is not possible.

Now, I’ve done my research on this forum and have found that many X5 owners have retrofitted their SAVs with both the Nav and DSP. Is the dealer being straight with me or not? I value your opinions!

Thanks.