Four Seasons 78344 A/C compressor for the 1998-1999 Mercedes-Benz S320 and other vehicles moves refrigerant through the air conditioning system. This new Four Seasons AC compressor is a Denso 10PA17C unit.
- Eight-groove pulley for a serpentine belt, with a 12-volt DC coil
- Clutch and speed sensor included
- New compressors are tested for durability equal to 100,000 miles
- Works with R134a and R1234yf refrigerant systems
- O-rings and sealing washers included for R12, R134a and R1234yf applications
Quick facts
- Part: Four Seasons 78344 A/C compressor
- Fits: 1998-1999 Mercedes-Benz S320 and other vehicles
- Condition: New
Warm air from the vents, a noisy compressor or a clutch that does not engage can mean the compressor is worn. A low refrigerant charge, a leaking line, a bad relay or a slipping belt can be behind those signs too, so find the cause before you buy.
Fits
This direct-fit compressor suits the 1998-1999 Mercedes-Benz S320, the 1994-1996 Mercedes-Benz S600 and the 1994-1999 Mercedes-Benz S420, and it is built to OE standards for consistent cooling. The 1998-1999 Mercedes-Benz S320 takes one compressor, and the part may require the OE manifold. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Quantity per vehicle: 1
- Outside pulley diameter: 4.750 in
- Pulley: 8 grooves, serpentine belt
- Mounting type: Tangent mount
- Outlet C length: 121 mm
- Connector type: Bullet
Build and materials
- Compressor type: Denso 10PA17C
- Condition: New
- Coil voltage: 12 V DC
- Refrigerant: R134a (also compatible with R1234yf); compatible oil: PAG 46
- Clutch and speed sensor: included
- Country of origin: China
In the box
One new compressor with its clutch and speed sensor, plus the O-rings, sealing washers and a compressor manifold gasket. Mounting hardware is not included, so plan on new bolts.
Installation notes
- Comes pre-charged with 3 ounces of PAG oil, which reduces prep time.
- OE-style connectors give a precise fit and help eliminate splicing.
Frequently Asked Questions
Does the Four Seasons 78344 compressor fit the 1998-1999 Mercedes-Benz S320?
Yes, Four Seasons 78344 fits the 1998-1999 Mercedes-Benz S320 and many other vehicles; open the "Vehicles it fits" section to check your exact model and engine.
Is this Four Seasons compressor right for the 1994-1999 Mercedes-Benz S420?
Yes. Four Seasons 78344 is a direct-fit compressor for the 1994-1999 Mercedes-Benz S420, which takes one.
Does this compressor come with the clutch and O-rings?
Yes, it includes the clutch, speed sensor, O-rings, sealing washers and a compressor manifold gasket, but mounting hardware is not included, so plan on new bolts.
What oil and refrigerant does this A/C compressor use?
It comes pre-charged with 3 ounces of PAG oil and works with R134a and R1234yf systems. The compatible refrigerant oil type is PAG 46.
Is the pulley on this new compressor a serpentine type, and how many grooves does it have?
Yes. The pulley is for a serpentine belt and has 8 grooves, with a 4.750 in outside diameter.
