Most W460s left the factory without AC, and factory Behr AC is treated as a genuinely rare and desirable option. Retrofits are common but debated: quotes range from roughly $5k for a modern Sanden/Vintage Air setup to claims the job can be done for far less, and even factory AC is described as marginal by modern standards.
Air conditioning: rare from factory, costly to retrofit
Mercedes-Benz Gelandewagen (W460) · ownership