2009 Mercedes-Benz R-Class
Vehicle Specs & Maintenance Data
The 2009 Mercedes-Benz R-Class maintenance specs on this page cover the key fluids, torque values, and wear items you need for routine service. Use these numbers as a quick reference when performing oil changes, tire rotations, brake jobs, and other scheduled maintenance on your Mercedes-Benz R-Class.
For oil changes, the 2009 Mercedes-Benz R-Class takes 0W-40 Full Synthetic motor oil with a capacity of 8 quarts. Brake fluid type is DOT 4, the recommended coolant is MB 325.0 (Blue, silicate-free), and transmission fluid is MB 236.14. Always use the manufacturer-recommended fluids to maintain warranty coverage and engine longevity.
When mounting wheels on the Mercedes-Benz R-Class, torque the lug nuts to 96 ft-lbs using a calibrated torque wrench. Over- or under-torquing can lead to warped brake rotors or loose wheels. Re-torque after 50 to 100 miles on newly installed wheels.
Owners of the 2009 Mercedes-Benz R-Class have reported 5 common issues including "Diesel DEF System Failures (BlueTEC)", "AIRMATIC Air Suspension Compressor Failure" and "Engine Mount Failure". Scroll down to the Diagnostics tab for detailed descriptions, solutions, and estimated repair costs.
Specifications on this page are compiled from multiple publicly available sources including manufacturer documentation, NHTSA data, and automotive databases. Always cross-reference with your owner's manual or official factory documentation before purchasing parts or performing any service.
The 2009 Mercedes-Benz R-Class uses 0W-40 Full Synthetic motor oil (8 qt capacity), requires lug nuts torqued to 96 ft-lbs, takes DOT 4 brake fluid.
Manufacturer-recommended maintenance schedule for the 2009 Mercedes-Benz R-Class. Always verify intervals against your owner's manual.
Enter a diagnostic trouble code to see causes, symptoms, and fixes for the 2009 Mercedes-Benz R-Class.
Common problems reported by 2009 Mercedes-Benz R-Class owners, with recommended fixes and estimated repair costs.
Diesel DEF System Failures (BlueTEC)
The BlueTEC diesel models experience AdBlue (DEF) system failures including pump failures, injector clogging, and heater element malfunctions. The vehicle can enter limp mode and display a countdown to engine shutoff if DEF faults are not resolved.
Replace the DEF pump, injector, or heater element as diagnosed. Ensure only high-quality DEF fluid is used. Mercedes issued TSBs for DEF system component updates. The DEF system requires proper winterization in cold climates.
Est. Cost: $800 - $3,000AIRMATIC Air Suspension Compressor Failure
The air suspension compressor works overtime due to small air leaks in the struts and lines, eventually burning out. The vehicle sags, ride quality deteriorates, and the suspension warning light illuminates.
Replace the air compressor and identify/repair any air leaks in the struts and lines. Install a new compressor relay to protect the new compressor. Aftermarket compressors are available at lower cost than OEM.
Est. Cost: $800 - $2,000Engine Mount Failure
The hydraulic-filled engine mounts deteriorate and collapse, causing excessive engine vibration, clunking noises during acceleration, and in severe cases the engine contacting the subframe. The mounts typically fail between 60,000 and 100,000 miles.
Replace both engine mounts and the transmission mount simultaneously. Use OEM mounts for the best ride quality and longevity. Aftermarket options are available at lower cost.
Est. Cost: $600 - $1,500Balance Shaft Sprocket Wear (M272)
The M272 V6 engine's balance shaft sprocket develops premature wear due to a soft metal alloy used in early production. This causes a timing chain rattle and can lead to catastrophic engine damage if the chain skips.
Replace the balance shaft, sprocket, timing chain, and all guides/tensioners. This is a major repair requiring significant engine disassembly. Mercedes extended warranty coverage for some affected production ranges.
Est. Cost: $3,000 - $6,000Rear Hatch Wiring Harness Failure
The wiring harness that routes through the rear hatch hinge develops broken wires from repeated flexing. This causes backup camera failure, rear wiper malfunction, rear defroster loss, and license plate light outages.
Repair or replace the broken wires in the rear hatch wiring harness. The repair involves splicing new wires or installing a complete new harness. Protective loom should be added to prevent future breakage.
Est. Cost: $300 - $800