Can you add Keyless Go to a 2007 S500 if it wasn't installed by the factory. This is one of the features that I would have liked but was not on the car when I purchased it.
Vehicle: 99 S420 (76k Mi) 90 300SE (87k Mi) 08 Lexus ES350 (7k Miles) 07 GMC Sierra (8k Miles) Sold list -->
Location: FL
Posts: 2,419
If you have money to burn and never see again, then yes it can be done. Otherwise look for another car that has it. I assume you are in Europe as you state S500.
If you really, really want it, you could ask how much from one of those real retrofit experts. This is definitely something a dealer would not do and the cost in any case is multiple times more than the cost from the factory.
You need a lot of parts and a lot of labour, the car needs to be ripped off almost completely for the wiring etc.
I don't remember anyone having had this done other than those experts that do for their own cars just for fun and to show "it can be done".
I'm about to try and do it. My 2008 ML seems to have all the wiring in place, so I'm hoping just adding the modules. I've got the part numbers, and am going to try it. Send me a message and I'll keep you up to date - it's going to take 3-5 weeks. I'm doing it myself just for grins.
I'm also doing the Voice Command System at the same time - that's a bit easier.