http://www.compressor-express.com/ac-compressor/mercedes/MB-65-7SEU17C-PV7
Some Mercedes C-Class W203/S203, CL-Class C215, S-Class W220 are built with
the same air conditioning compressor. The Original Equipment Manufacturer
Numbers (OEM numbers) are Mercedes 0002308611, A0002308611.
The air-conditioning system of these
vehicles was assembled with a Denso 7SEU17C compressor. Manufacturer numbers: Denso 447170-8340, 447170-8341.
These ac units seem to be interchangeable.