A/C compressor replaced by new version - BT83.55-P-0001-01B

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ENGINE 120 /

in MODEL WBD129.### #F,

WBD140.### #A with CODE (581a) Air conditioning (automatic)

A/C compressor 10PA20

Fig 1: Identifying A/C Compressor New Version Parts Location

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Belt protection:

Previously the A/C compressor was switched off by the engine system control module (N16) when it became difficult to turn. With introduction of the electro-magnetic clutch, it assumes this belt protection feature.

A melting fuse is located in the A/C compressor clutch solenoid which switches off the slipping poly-V-belt when the A/C compressor starts to lock up due the heat development. The previous slip recognition via the speed sensor in the A/C compressor is eliminated; therefore the electrical connector has only 1 pin.

The A/C compressor should be replaced completely when the melting fuse is defective due possible damage to the A/C compressor.