We actually don't have a 5 meter global elevation for Mars. The imagery is 5 mpp but the elevation data used in the links is MOLA and is closer to 500 meters per pixel (with another merged product at 200 mpp). It is almost more weird/cool that we have hundreds (thousands?) of 1 mpp elevation models for small areas of Mars from HiRISE (available for free from the PDS) and larger swaths at ~20 meters per pixel from CTX imagery used in this global mosaic, but still not close to a global product.

various sources: 1. https://astrogeology.usgs.gov/search/details/Mars/GlobalSurv... 2. https://astrogeology.usgs.gov/search/map/Mars/Topography/HRS... 3. https://www.uahirise.org/dtm/ 4. https://stac.astrogeology.usgs.gov/docs/data/mars/ctxdtms/