Complete Oil Specifications
Your 2022 Mercedes-Benz C-Class C300 requires 5W-30 full synthetic oil with specific Mercedes-Benz MB 229.6 or MB 229.71 approval — a standard that goes beyond typical API or ACEA ratings.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 5W-30 |
| MB Approval | MB 229.6 / MB 229.71 / ACEA C3 |
| Capacity (with filter) | 6.3 quarts |
| Oil Filter | Mercedes-Benz A2761800109 |
| Normal Interval | 10000 miles or 1 year |
Why MB-Approved Oil is Non-Negotiable
The M254 2.0L engine features an integrated starter-generator (EQ Boost hybrid system), twin-scroll turbocharger, and cylinder head integrated into the exhaust manifold. Mercedes-Benz approval codes (MB 229.6, MB 229.71) certify oils that can handle the extreme temperatures near the integrated manifold and the electrical demands of the 48V EQ Boost system.
Using non-MB-approved oil will:
- ❌ Risk voiding the Mercedes-Benz factory warranty
- ❌ Cause premature turbo bearing wear due to inadequate HTHS viscosity
- ❌ Potentially damage the EQ Boost starter-generator’s lubrication passages
Mercedes-Benz-Approved Oil Brands
-
✅ Mercedes-Benz Genuine Engine Oil 5W-30 MB 229.6
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✅ Mobil 1 ESP 5W-30 (MB 229.51/229.52 approved)
-
✅ Castrol Edge Professional LL III 5W-30
-
✅ Shell Helix Ultra ECT C3 5W-30
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✅ Liqui Moly Synthoil High Tech 5W-30
Verify the exact MB approval number on the bottle — MB 229.6 is the primary spec for the C300. MB 229.71 is also approved for the M254 engine.
Severe Service Check
You need the 5000-mile interval if you:
- Use the vehicle primarily for short city trips under 5 miles
- Frequently drive in temperatures above 95°F (35°C)
- Drive in heavy traffic or stop-and-go conditions daily
- Use sport mode or spirited driving regularly
- Experience sustained cold starts below 14°F (-10°C)
Mercedes uses a Service A/B interval system based on an Assyst Plus computer — always follow the in-vehicle reminder over fixed mileage.
Installation Details
Drain Plug Torque: 22 ft-lbs (30 Nm)
The C300 uses a plastic drain plug with an integrated metal inserts — do not overtighten or the threads will strip.
OEM Filter: Mercedes-Benz A2761800109
Aftermarket Filters:
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Mann-Filter HU 6020 z
-
Mahle OX 421/2D
-
Bosch 1 457 429 310
Pro Tip: The M254 engine uses a cartridge-style oil filter housing on the top of the engine. The housing cap torques to 18 ft-lbs. Lightly oil the new O-rings before installation.
FAQs
What oil does a 2022 Mercedes-Benz C300 take?
5W-30 full synthetic oil with Mercedes-Benz MB 229.6 or MB 229.71 approval.
How many quarts does it need?
6.3 quarts with a new filter (approximately 6.0 liters).
Can I use 0W-40 in my C300?
Only if it carries MB 229.5 or higher approval. The C300 spec calls for 5W-30 MB 229.6 — stick to this for warranty compliance.
Is synthetic oil required?
Yes. Mercedes-Benz mandates full synthetic oil for all modern AMG-line engines.
How often does a C300 need an oil change?
Every 10,000 miles or 1 year based on normal Service A intervals. Follow the Assyst Plus display for most accurate intervals.
What is EQ Boost on the C300?
A 48-volt integrated starter-generator that provides mild hybrid assistance, eliminating the traditional belt-driven alternator and providing up to 21 hp of boost.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-02-23 | Source: Needs OEM source confirmation (manual/spec page URL pending).