Interior: R170 becomes R171

Hello I’ve been researching for a while, but unfortunately I haven’t found anything. It’s about the following: My decision to buy a SLK this year has fallen. I like both the R171 and the R170. My budget limit is 15,000,- €, so my selection will be very limited as far as the R171 is concerned. Is there a way to adjust the command dingsda (i.e. radio etc.) of an R170 to the modern and how I find much more beautiful optics of an R171? If yes, where can I have that done and at what price? I know that some people like the “old” design of the R170 as far as the radio console is concerned, but I don’t like it. I also saw some SLK, where the color (e.g. red) is worn out inside (this has nothing to do with the radio console now). Is there a possibility of improvement here? I would be happy about helpful information!