MB-11-7SB16C-PV6

According to DENSO they know ac units better than anyone because they originally designed them.

http://www.compressor-express.com/ac-compressor/mercedes/MB-11-7SB16C-PV6

Some Mercedes C-Class W202, Mercedes CLK-Class C208, Mercedes E-Class W210, Mercedes G-Class W463, Mercedes M-Class W163, Mercedes S-Class W140,  Mercedes SLK-Class R170, Mercedes Sprinter 2-T W901 / 902, Mercedes Sprinter 3-T W903, Mercedes Sprinter 4-T W905, Mercedes V-Class W638/2 and Mercedes Vito W638 are built with the same air conditioning compressor. The Original Equipment Manufacturer Numbers (OEM numbers) are Mercedes 0002300911, Mercedes 0002302011, Mercedes 0002303911, Mercedes 0002306811, Mercedes 0002307011, Mercedes 0002340911, Mercedes 0002342411, Mercedes 0002342911, Mercedes 0002343111, Mercedes A0002302011, Mercedes A0002306811, Mercedes A0002307011, Mercedes A0002343111.

The air-conditioning system of these vehicles was assembled with a Denso 7SB16C compressor, compressor manufacturer numbers: Denso 447100-2031, Denso 447100-6820, Denso 447100-6821, Denso 447100-6824, Denso 447100-6825, Denso 447100-6826, Denso 447100-6827, Denso 447100-6828, Denso 447100-9230, Denso 447100-9231, Denso 447100-9232, Denso 447100-9233, Denso 447100-9234, Denso 447170-5730, Denso 447170-5731, Denso 447170-5732, Denso 447170-5733, Denso 447170-5734, Denso 447170-5735, Denso 447170-5736, Denso 447170-5737, Denso 447170-5740, Denso 447170-5741, Denso 447170-5744, Denso 447170-5745, Denso 447170-5746, Denso 447170-5747, Denso 447170-7680, Denso 447190-7810, Denso 447190-7815, Denso 447190-7820. These ac compressors seems to be interchangeable.