Benz is no better, if you paid less than $200,000.00 for it then chances are very good the leather seats wont last 10 years tops because they are not all leather. Most are vinyl, Pleather & leather mix.
Whoa whoa whoa, what the hell are you on?
You can get ANY Mercedes-Benz vehicle with Leather. Be it a C-Class or any other class.
There are 4 common options for Mercedes-Benz seating arrangements (in the US). You can get MB Tex, which is what you're calling "pleather," which is not leather, but an imitation leather that still looks and feels great, but is much more durable.
Any vehicle equipped standard with this option is strictly for cost reduction. Leather is, in fact, a highly purchased option.
You can get leather in ANY Mercedes-Benz you'd like. Real leather, and good leather. No offense, but it will kick anything out of Lexus or Toyota's lots. Any leather interior not cared for or left in the sun, be it a Bentley, Rolls Royce, Maybach, or Mercedes-Benz, will crack and fade. It's cow skin, it's not magically durable based on price.
The most expensive option is Designo Leather. Designo is a company that takes Mercedes-Benz vehicles before they're sold and reupholsters them with fine leather.
The last is cloth, which is insanely rare. I've seen it in some ML's, though.
Sorry bud. Whether it's a $40,000 C350, a $70,000 E550, a $215,000 S65 AMG, or a $545,000 Maybach Zeppelin, they'll all have options for the best leathers to be equipped in a vehicle.
I just took a quick venture outside to show you a few interiors.
Here's a Maybach 57S. A $450,000 standard equipped car, it has the same quality leather you'll get in a well equipped C300, C350, E350 and so on.
57S:
CL65 AMG: ($215k+)
E350 Cabriolet, equipped with MB Tex. Still feels and looks great. Will last longer, too, contrary to you saying they'll wear out faster.
Designo equipped Pre-owned 2009 SL550 (Barely $110k new). 2 years and 25,000 miles.
Even this Lamborghini Murcielago LP640 Roadster we have on our lot:
So, all in all, Mercedes-Benz leathers are one of the best leathers available.