Bosch 1986AD1128 A/C Compressor

Bosch A/C Compressor for Mercedes-Benz

Restore cabin cooling with this Bosch A/C compressor, part number 1986AD1128. Built for Mercedes-Benz applications, it matches OE-style casting, pulley, and connector specifications for a direct replacement on select SL, E-Class, and 300-series models.

With R134A refrigerant compatibility, PAG 46 oil fill, and a 12-volt coil, this compressor is built around the core specifications needed for a proper HVAC repair. Bosch’s A/C compressor line draws on OE manufacturing experience and release testing that checks endurance, performance, vibration, leak resistance, salt spray exposure, and noise.

Key Features

• Part number: 1986AD1128
• Refrigerant type: R134A
• Compatible oil type: PAG 46
• Oil filled: Yes
• 6-groove pulley design
• 120 mm outside pulley diameter
• 12-volt coil voltage
• Without seal ring
• OE-aligned casting, pulley, and connector specifications

Fitment Coverage

• Fits 1994-2002 Mercedes-Benz SL600, A/C Compressor
• Fits 1994-1999 Mercedes-Benz SL500, A/C Compressor
• Fits 1994-1997 Mercedes-Benz SL320, A/C Compressor
• Fits 1995 Mercedes-Benz E300, A/C Compressor
• Fits 1994-1995 Mercedes-Benz E320, A/C Compressor
• Fits 1994-1995 Mercedes-Benz E420, A/C Compressor
• Fits 1994 Mercedes-Benz E500, A/C Compressor
• Fits 1988-1993 Mercedes-Benz 300CE, A/C Compressor
• Fits 1990-1993 Mercedes-Benz 300D, A/C Compressor
• Fits 1986-1993 Mercedes-Benz 300E, A/C Compressor
• Fits 1990-1993 Mercedes-Benz 300SL, A/C Compressor
• Fits 1988-1993 Mercedes-Benz 300TE, A/C Compressor
• Fits 1992-1993 Mercedes-Benz 400E, A/C Compressor
• Fits 1992-1993 Mercedes-Benz 500E, A/C Compressor
• Fits 1990-1993 Mercedes-Benz 500SL, A/C Compressor
• Fits 1993 Mercedes-Benz 600SL, A/C Compressor
• Fits 1988-1991 Mercedes-Benz 300SE, A/C Compressor
• Fits 1988-1991 Mercedes-Benz 300SEL, A/C Compressor
• Fits 1991 Mercedes-Benz 350SD, A/C Compressor
• Fits 1990-1991 Mercedes-Benz 350SDL, A/C Compressor
• Fits 1987-1989 Mercedes-Benz 260E, A/C Compressor

Detailed Description

This Bosch compressor is a direct-fit HVAC replacement for Mercedes-Benz models that use an R134A system with PAG 46 oil. It is engineered to align with OE specifications for the pulley, connector, and casting details, helping support proper belt alignment and system integration on Mercedes-Benz SL600, SL500, SL320, E320, E420, and related 300-series applications. Part number 1986AD1128 is also referenced for select interchange applications.

This part cross-references 0002300511 and 0002300611 for the same application.

Common Repair Symptoms

• No cold air from the vents
• Weak or inconsistent A/C output
• Compressor noise or vibration during operation
• Refrigerant pressure loss from compressor wear
• Belt drive issues related to compressor pulley alignment

Installation Notes and Tips

Verify refrigerant type, oil specification, pulley groove count, and connector match before installation. Flush the system as needed, replace contaminated oil with the correct PAG 46 specification, and evacuate and recharge the system to factory requirements after installation. Confirm belt routing and inspect related HVAC components before returning the vehicle to service.

Quality Assurance

Bosch subjects its A/C compressors to endurance, performance, vibration, leak, salt spray, and noise testing before release. That validation process supports consistent operation across demanding driving conditions and helps ensure the compressor meets OE-style fit and function expectations.