That's a slick looking service car. I'd be guessing that, rather than a hearse, it would be a "first call" car. The one they would send out to a family's house when the deceased first passes. Then use something more formal for the funeral procession.
But I could be wrong. I'm no expert, I just looked into getting a hearse for a while to use as a station wagon. I like 'em big.
Edited to add:
Or maybe not. I remember seeing a European Benz hearse over here for sale a little while back (another one on the list of "Cars I Didn't Buy"), and it had similar proportions. If, for some reason, it was originally sourced for the European market, It would likely have been smaller than the hearses we're used to seeing over here.
I'd love to know the answer.