As stated earlier, there is more to replacing an A/C compressor. The drier should be replaced, and all parts should be flushed properly in both directions to clear any metal debris or particles from black death. In some cases, the condenser should be replaced. Make sure to look at a receipt which hopefully details all of these steps. Otherwise, you could end up sinking a couple G-notes or more into that car.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280