2021 Mercedes-Benz Sprinter Maintenance Schedule

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The 2021 Mercedes-Benz Sprinter is a versatile and reliable workhorse, renowned for its spaciousness, capability, and fuel efficiency. To keep this valuable asset performing optimally and to ensure its longevity, adhering to a comprehensive maintenance schedule is crucial. This guide, prepared by an ASE-certified master technician, outlines the factory service intervals, common issues, severe-duty adjustments, typical service costs, and recall awareness specific to the 2021 Sprinter.

Factory Service Intervals

Mercedes-Benz utilizes a flexible service system for the Sprinter, primarily dictating service based on mileage or time, whichever comes first. The onboard ASSYST PLUS system will notify you when service is due. However, general recommendations are provided below.

Engine Oil and Filter:

For most 2021 Sprinter models (both gasoline and diesel), Mercedes-Benz recommends oil changes every 15,000 miles or 1 year, whichever comes first. This interval is critical for engine health, as fresh oil lubricates components, prevents wear, and helps cool the engine. Always use Mercedes-Benz approved synthetic oils (e.g., MB 229.51 or MB 229.52 for diesel, MB 229.5 for gasoline) and genuine Mercedes-Benz filters.

Fuel Filter:

For diesel Sprinters, the fuel filter is a vital component for protecting the high-pressure fuel system from contaminants. Replacement is generally recommended every 30,000 miles or 2 years. Gasoline models typically have a fuel filter integrated within the fuel tank and may have a longer service interval, often "for life" of the vehicle, though checking your owner's manual is always advised.

Air Filter (Engine):

The engine air filter ensures clean air goes into the engine, crucial for efficient combustion and preventing wear. Replacement is typically recommended every 45,000 miles or 3 years, but this can vary based on driving conditions.

Cabin Air Filter:

For the comfort and health of occupants, the cabin air filter should be replaced every 20,000 miles or 2 years. This filter traps dust, pollen, and other allergens from entering the cabin.

Brake Fluid:

Brake fluid is hygroscopic, meaning it absorbs moisture over time, which can reduce its boiling point and compromise braking performance. Mercedes-Benz recommends replacing brake fluid every 2 years, regardless of mileage.

Transmission Fluid:

The transmission fluid service interval depends on the transmission type and engine. For the 7G-TRONIC (7-speed automatic) and 9G-TRONIC (9-speed automatic) transmissions found in the 2021 Sprinter, a transmission fluid and filter change is typically recommended at 60,000 miles or 4 years. This is a crucial service for the longevity and smooth operation of your transmission.

Spark Plugs (Gasoline Models):

For gasoline-powered Sprinters, spark plugs typically require replacement between 60,000 and 80,000 miles, depending on the specific engine and plug type. Diesel engines do not use spark plugs.

Coolant:

Modern Mercedes-Benz coolants are designed for long life. Most 2021 Sprinter models have a coolant that is considered "lifetime" fill, but it's always recommended to have its level and condition checked during routine services. If replacement is necessary due to contamination or repairs, use only Mercedes-Benz approved coolant.

Timing System:

The 2021 Sprinter, across its engine variants (both gasoline and diesel), utilizes a timing chain system. Timing chains are generally designed to last the life of the engine and do not have a scheduled replacement interval like timing belts. However, it's important to listen for any unusual noises (like rattling) that could indicate a worn timing chain and have it inspected immediately.

Maintenance Schedule Breakdown Table

Service Item	Interval (Mileage)	Interval (Time)	Notes
Engine Oil & Filter	15,000 miles	1 year	Use MB-approved synthetic oil and genuine filter
Fuel Filter (Diesel)	30,000 miles	2 years	Crucial for protecting the diesel fuel system
Engine Air Filter	45,000 miles	3 years	More frequent replacement if driving in dusty conditions
Cabin Air Filter	20,000 miles	2 years	Improves cabin air quality
Brake Fluid	N/A	2 years	Prevents moisture absorption and maintains braking performance
Transmission Fluid & Filter	60,000 miles	4 years	Essential for transmission longevity and smooth shifts
Spark Plugs (Gasoline)	60,000-80,000 miles	N/A	Only applicable to gasoline engines
Coolant	"Lifetime"	"Lifetime"	Check level and condition at every service
Timing Chain	No set interval	No set interval	Designed for life of the engine; inspect if unusual noises are present

Known Issues and Common Problems for this Generation (VS30)

The 2021 Sprinter falls within the VS30 generation, introduced in 2019. While generally very reliable, a few common issues and considerations can arise:

• DEF System (Diesel Exhaust Fluid) Issues: For diesel models, issues with the DEF system, including sensor failures, crystallisation in the tank, or heater malfunctions, can occur. These can lead to "limp mode" and require dealer intervention. Proper maintenance, including using high-quality DEF fluid, can mitigate some risks.
• Electrical Gremlins: Like many modern vehicles with extensive electronics, the Sprinter can occasionally experience minor electrical issues, such as faulty sensors, infotainment glitches, or auxiliary battery drain. These are often resolved with software updates or sensor replacements.
• Suspension Components (Heavy Use): Sprinters used for heavy hauling or on rough terrain may experience accelerated wear on suspension components like struts, shocks, and bushings. Regular inspection of these components is vital.
• Sliding Door Rattle: Some owners report rattles from the sliding door mechanism, which can often be resolved with adjustments or lubrication.
• Turbocharger Issues (Diesel): While not widespread, some diesel models may experience turbocharger-related issues, often manifesting as a lack of power or unusual noises. Regular oil changes with the correct specification oil are crucial for turbocharger longevity.

Severe-Duty Adjustments

If your 2021 Sprinter operates under severe conditions, you should adjust your maintenance schedule accordingly. Severe duty includes:

• Frequent short trips or idling
• Operating in extremely hot, cold, or dusty environments
• Towing heavy loads or consistently driving at maximum payload
• Driving on rough, unpaved, or mountainous roads

For severe duty, consider:

• Engine Oil and Filter: Reduce the interval to 10,000 miles or 6 months.
• Fuel Filter (Diesel): Replace every 15,000-20,000 miles.
• Engine Air Filter: Inspect and replace more frequently, potentially every 20,000 miles or annually.
• Transmission Fluid: Consider replacing every 40,000-50,000 miles.
• Brake Inspection: Inspect brakes more frequently (e.g., every 5,000-7,500 miles) due to increased wear from heavy loads or mountainous driving.

Typical Cost Per Service (Estimates)

Service costs can vary significantly based on location, shop rates, and the specific parts used. These are general estimates for a 2021 Mercedes-Benz Sprinter:

• Oil Change (Synthetic, Filter, Labor): $180 - $350
• Fuel Filter Replacement (Diesel): $150 - $250
• Engine Air Filter Replacement: $80 - $150
• Cabin Air Filter Replacement: $70 - $130
• Brake Fluid Flush: $150 - $250
• Transmission Fluid & Filter Service: $400 - $800 (this is a more involved service)
• Spark Plug Replacement (Gasoline, parts & labor): $300 - $500
• Brake Pad Replacement (per axle): $300 - $600 (rotors extra, if needed)

These estimates do not include additional services that may be recommended during inspections, such as tire rotations, wiper blade replacement, or fluid top-offs. Always obtain a detailed quote before authorizing any work.

Recall Awareness

Mercedes-Benz is diligent in issuing recalls for safety or significant operational issues. As of early 2024, some notable recalls for the 2021 Sprinter (and the VS30 generation) have included:

• Communication Module Software: Issues potentially affecting eCall (emergency call system) functionality. (Various dates)
• Fuel Pump Issues: Potential for fuel pump failure leading to stalling. (Various dates, primarily for 2.0L diesel engines)
• Steering Column/Steering Gear Issues: Potential for issues affecting steering functionality. (Various dates)

It is crucial to stay informed about any open recalls for your specific VIN (Vehicle Identification Number). You can check for open recalls by visiting the NHTSA (National Highway Traffic Safety Administration) website or the Mercedes-Benz recall information page and entering your Sprinter's VIN. Address any open recalls promptly at an authorized Mercedes-Benz service center, as these repairs are performed free of charge.

Find a trusted shop on Repairius

Maintaining your 2021 Mercedes-Benz Sprinter properly is key to its reliability and your peace of mind. For all your service needs, from routine maintenance to more complex repairs, trust the certified professionals on Repairius. Find a reputable and experienced shop near you to ensure your Sprinter receives the expert care it deserves.