2020 Mercedes-Benz Sprinter A/C Refrigerant & Oil Capacity Guide

Quick answer

• Refrigerant Type: R-1234yf
• Full System Charge: 900 grams (31.7 oz)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 130 mL (4.4 oz)
• Low-Side Service Port Location: On the refrigerant line, typically near the firewall on the passenger side.
• High-Side Service Port Location: On the larger diameter line, usually closer to the compressor on the passenger side.

Why R-1234yf matters

For your 2020 Mercedes-Benz Sprinter, the A/C system uses R-1234yf refrigerant. This is a significant change from the older R-134a refrigerant, which was phased out in new vehicles starting around 2014 due to its higher global warming potential. R-1234yf is a more environmentally friendly option, but it comes with a few implications you should be aware of.

First, R-1234yf is significantly more expensive than R-134a. This can increase the cost of any A/C system repairs or recharges. Second, due to its mild flammability, special equipment is required to recover and recharge R-1234yf systems safely. This means that not all shops will be equipped to service your Sprinter's A/C, and it's imperative to choose a facility with the proper tools and training.

Recharge procedure

Recharging your Sprinter's A/C system is not as simple as just adding a can of refrigerant. It's a precise procedure that requires specialized equipment. The most crucial steps include:

1. Evacuation: The system must be thoroughly evacuated to remove all old refrigerant, air, and moisture. Moisture in an A/C system can lead to component damage and poor cooling performance.
2. Leak Testing: Before adding new refrigerant, the system should be leak tested to ensure there are no breaches that would allow the new refrigerant to escape.
3. Proper Charge by Weight: Refrigerant must be added by weight, not by pressure. Using pressure gauges alone can lead to an over or undercharge, both of which can reduce efficiency and potentially damage the compressor. Your 2020 Sprinter requires 900 grams (31.7 oz) of R-1234yf refrigerant.
4. PAG Oil: If components have been replaced or the system has been opened for an extended period, the correct PAG 46 oil type and amount (130 mL or 4.4 oz) must be added or topped off.

Safety Disclaimer: Working with automotive air conditioning systems and refrigerants requires specialized knowledge and equipment. Improper handling of refrigerants can cause severe injury, including frostbite, and can release harmful chemicals into the environment. Federal law (EPA Section 609) requires that anyone servicing a motor vehicle A/C system be properly trained and certified. It is always recommended to seek professional assistance for A/C system service and repairs.

Common A/C problems for this vehicle

While the Mercedes-Benz Sprinter is a robust vehicle, its A/C system can experience common issues. For the 2020 model year, typical problems include:

• Compressor Failures: The A/C compressor is a hardworking component. Issues can range from internal mechanical failure to clutch problems (though many modern compressors are clutchless). Symptoms often include a lack of cold air, unusual noises when the A/C is on, or a completely inoperative system.
• Condenser Issues: The condenser, located at the front of the vehicle, is susceptible to damage from road debris. A punctured condenser will lead to a refrigerant leak and a loss of cooling. Blocked fins can also restrict airflow, reducing heat exchange and A/C performance.
• Evaporator Leaks: The evaporator, located inside the dashboard, can develop leaks over time. These are often harder to diagnose as the leaked refrigerant can be slow and accompanied by a musty odor from the interior vents. Evaporator replacement is a more involved repair due to its location.
• Electrical Problems: Modern A/C systems rely heavily on electrical components, including sensors, relays, and control modules. A fault in any of these can lead to an A/C system that doesn't switch on or cool properly.

When to call a pro

If you're experiencing any of the following symptoms with your Sprinter's A/C, it's time to consult a certified professional:

• Your A/C is blowing warm air.
• The fan is working, but there's no airflow.
• You hear unusual noises (clunking, hissing, grinding) when the A/C is on.
• There's a noticeable leak under your vehicle.
• The A/C system turns on and off intermittently.

An experienced technician can accurately diagnose the problem, perform necessary repairs, and ensure your A/C system is recharged correctly, using the appropriate R-1234yf refrigerant and PAG 46 oil.

Find a certified A/C shop on Repairius.