The 2016 Mercedes E350 takes synthetic motor oil that meets Mercedes-Benz specification MB 229.5 or MB 229.51, typically 5W-40.
In this article we outline the official oil specification, viscosity guidance, and practical tips to ensure you use the correct oil for your climate and driving conditions. Always verify with your owner’s manual or the oil cap on your engine.
Official oil specification for the 2016 E350
Mercedes-Benz specifies that the engine requires synthetic oil that meets MB 229.5 or MB 229.51. Oils meeting these specs are designed for the long-life service schedules and the engine’s emission-control systems.
Understanding MB 229.5 vs MB 229.51
MB 229.5 is the older long-life specification used across many modern Mercedes engines. MB 229.51 is a newer variant with enhanced stability for extended drain intervals. Both are acceptable for the 2016 E350, but always check your manual for the exact requirement for your vehicle and market.
Viscosity guidance
The typical viscosity recommended for the 2016 E350 gasoline engine is 5W-40. In very cold climates, 0W-40 may be acceptable if MB 229.5/229.51 allows it for your engine and climate; confirm in the manual or with a dealer.
Before any list: here is the key information you need to know:
- Oil must be synthetic and MB-approved for 229.5 or 229.51.
- Recommended viscosity for most markets is 5W-40; 0W-40 is an alternative only if MB 229.5/229.51 allows it for your engine and climate.
- Always use oil that displays MB 229.5/229.51 on the bottle and avoid oils not approved to these specs.
Using the correct oil helps with engine protection, fuel efficiency, and long-term reliability. Follow the schedule and never mix different oil brands or viscosities without confirmation.
Practical tips for maintaining oil health
In addition to choosing the right viscosity and MB spec, follow these tips to maximize engine life and performance:
- Check the owner's manual for the exact oil grade and interval; many models use a long-life drain interval, but this can vary by market and driving conditions.
- Choose an oil with current MB 229.5/229.51 approval; the MB approval ensures compatibility with engine seals and emission controls.
- Ensure a proper oil change procedure, replacing the oil filter at the same time; use a genuine filter to avoid bypass or contamination.
Sticking to these practices helps protect the engine and maintain performance over time. If you are unsure, visit an authorized Mercedes-Benz service center or consult the owner's manual for the exact oil specification and change interval for your vehicle’s VIN and market.
Summary
The 2016 Mercedes E350 requires synthetic motor oil that meets MB 229.5 or MB 229.51, with 5W-40 being the standard viscosity in most markets. Always confirm the exact spec and climate-based recommendations in the owner's manual or at a dealership, and ensure the oil is MB-approved before use.