1980 450SL has a delco harrison A6 compressor possible to replace clutch on the motor.... if you are real real good, with exactly the tools designed for use in tight spaces.

New A6 compressors are so cheap we haven't replaced a clutch in 15 years.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician