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2008 Mercedes-Benz R-Class Recalls, Problems & Maintenance

The 2008 Mercedes-Benz R-Class has no open NHTSA recalls. Owners report 4 recurring issue clusters, led by “Power steering rack and pump failure.” Mercedes-Benz alternates two service events: Service A (oil, filter, inspection) at roughly 10,000 miles or 1 year, then Service B (Service A plus brake fluid, cabin filter, and deeper checks) at roughly 20,000 miles or 2 years — the ASSYST Plus counter in the cluster tells you which is due. Oil must carry the MB-Approval number your engine specifies (commonly 229.5, or 229.71 for newer 0W-20 engines); 'meets or exceeds' marketing language is not an approval. Electric EQB and EQS models keep the A/B rhythm for inspections, brake fluid, and cabin filters — just without oil.

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No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2008 Mercedes-Benz R-Class.

Reported to NHTSA

Power steering rack and pump failure

STEERING

10 NHTSA complaints · 2013-01 → 2019-11

“I HAVE AN MERCEDES R350 MODEL YEAR 2008. IT HAS 60,050 MILES NOW BUT I HAVE JUST BEEN TOLD THAT I NEED TO REPLACE THE ENTIRE STEERING RACK - $4000 QUOTED FROM MERCEDES-BENZ VALENCIA IN CALIFORNIA. IT HAS A FLUID LEAK FROM THE STEERING RACK”
— Owner report, NHTSA ODI #10492541
“MY MERCEDES R350 SPORADICALLY BECOMES VERY DIFFICULT TO STEER. I NOTICED THAT THIS HAPPENS AFTER A FEW MINUTES OF CITY STREET DRIVING”
— Owner report, NHTSA ODI #10894939
“TL* THE CONTACT OWNS A 2008 MERCEDES BENZ R350. THE CONTACT STATED THAT WHILE DRIVING AT A LOW SPEED, AN ABNORMAL NOISE EMITTED AS THE STEERING WHEEL SEIZED. THE CONTACT HAD TO USE EXTREME FORCE IN ORDER TO MANEUVER THE VEHICLE”
— Owner report, NHTSA ODI #10659663

Read all complaints on NHTSA →

Brake booster corrosion and stop-drive recall delay

SERVICE BRAKES

6 NHTSA complaints · 2022-05 → 2025-07

“Every time I braked, car not stop until very close to the car in front of me. Couples time I hit the car in front of me”
— Owner report, NHTSA ODI #11468335
“Hi I received a letter from Mercedes for a stop drive recall (NHTSA #22V315, MBUSA ID: 2022050014 & 2022050015), so I bought my Mercedes R350 to the shop for repair on July 15, 2022”
— Owner report, NHTSA ODI #11480317
“The brake fluid lines are corroding much faster than in other models, and without actual corrosion under the car. It happened to my car, and I have been reading forums of MB owners of this same R model, as well as C, E, GLK, and ML models all reporting the same issues”
— Owner report, NHTSA ODI #11672152

Read all complaints on NHTSA →

Air suspension self-leveling failure

SUSPENSION

12 NHTSA complaints · 2012-09 → 2022-05

“THE RIGHT AIR BAG SUSPENSION WENT OUT WITHOUT WARNING CAUSING THE CAR TO BECOME UNDRIVEABLE BECAUSE IT SAT ON THE BACK RIGHT WHEEL”
— Owner report, NHTSA ODI #10779358
“REAR SUSPENSION HAS FAILED. AFTER VIEWING NUMEROUS OF SITES THIS SEEMS TO BE A MAJOR PROBLEM.MERCEDES HAS NOT RECALLED THIS PROBLEM AND IT SHOULD.CAR LOWERS TO THE GROUND AND THERE IS NO WARNING WHEN THIS HAPPENS”
— Owner report, NHTSA ODI #10557401
“TL* THE CONTACT OWNS A 2008 MERCEDES BENZ R350. THE CONTACT STATED THAT THE VEHICLE ABNORMALLY LEANED TO THE LEFT. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC FOR INSPECTION, WHO LOCATED THE FAILURE AT THE AIR SUSPENSIONS”
— Owner report, NHTSA ODI #10616717

Read all complaints on NHTSA →

Balance shaft and intake manifold engine failure

ENGINE

4 NHTSA complaints · 2015-05 → 2019-01

“TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ R350. WHILE DRIVING APPROXIMATELY 45 MPH, THE ENGINE MADE A LOUD NOISE AND THE VEHICLE SHUT OFF. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE ENGINE NEEDED TO BE REPLACED DUE TO A FAULTY BALANCE SHAFT”
— Owner report, NHTSA ODI #11166265
“I THANKFULLY TOOK MY CAR TO HAVE REGULAR MAINTENANCE (SERVICE B) COMPLETED AND UNFORTUNATELY DURING THAT INSPECTION, THEY FOUND THAT THE RUBBER CYLINDER ON THE HARMONIC BALANCER WAS HANGING OUT”
— Owner report, NHTSA ODI #10714698
“TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ R350. THE CONTACT STATED THAT THE VEHICLE BEGAN EXPERIENCING ENGINE FAILURES AFTER THE DEALER (SILVER STAR MOTORS, 36-11 NORTHERN BLVD, LONG ISLAND CITY, NY 11101, (855) 216-2452)”
— Owner report, NHTSA ODI #11119827

Read all complaints on NHTSA →

Issues on other model years

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Service A — Oil & Filter + Inspection

Every 10,000 mi

Every 10,000 miles or 12 months: oil and filter with MB-Approved oil, fluid top-offs, tire check, and inspection. AMG models driven hard: many owners service at 5,000-7,500 miles.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

Service B — Major Inspection

Every 20,000 mi

Every 20,000 miles or 2 years, alternating with Service A: everything in A plus brake-fluid replacement, cabin filter, and a deeper multi-point inspection of brakes, suspension, and driveline.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free with any paid service. A flashlight and 10 minutes covers the basics yourself.

Tire Rotation

Every 10,000 mi

Rotate at every Service A where the tire sizes allow. Many AMG and 4MATIC+ models run staggered widths that can't rotate front-to-rear — check your spec before paying for a rotation.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

Brake Inspection

Every 10,000 mi

Checked at every A/B service via electronic pad-wear sensors. Replace sensors with pads. Heavy EQS models wear pads slowly (regen braking) but rotors can corrode from disuse — an inspection catches that.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

Brake Fluid

Every 20,000 mi

Replaced every 2 years as part of Service B — Mercedes schedules it on time, not miles, because DOT 4 fluid absorbs moisture regardless of driving.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Automatic Transmission Fluid (7G / 9G-Tronic)

Every 70,000 mi

Mercedes specifies fluid and filter service around 70,000 miles on most 7G- and 9G-Tronic gearboxes — check your year's sheet. Use only the MB-spec fluid for your transmission code; independent specialists often service at 60,000 on hard-driven cars.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Spark Plugs

Every 60,000 mi

Most modern MB gas engines: plugs around 60,000 miles — AMG engines often sooner. Check your engine's sheet; twin-turbo V8 plug jobs are labor-heavy, so pair with other scheduled work.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Engine Air Filter

Every 40,000 mi

Replace around every 40,000 miles (twin-filter setups on V6/V8 engines double the parts bill). Inspected at every Service B.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Combination / Dust Filter

Every 20,000 mi

Replaced with every Service B. Models with the ENERGIZING air package use a higher-grade filter — priced accordingly.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.

Engine Coolant

On condition / lifetime

MB-spec coolant is long-life (typically ~10 years / 150,000 miles on the sheet). Refresh only with MB 325/326-spec coolant — the wrong chemistry attacks aluminum and head gaskets.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

12V & Auxiliary Battery

Every 25,000 mi

Test annually after year 3. Most modern Mercedes carry a second auxiliary battery; a weak one triggers cascading warning messages long before a no-start. EQ models also depend on the 12V system to boot.

Estimated cost — typical U.S. ranges

Dealer

~$225–$390

Shop

~$160–$280

DIY

~$130–$250

Most auto-parts stores test and install batteries free with purchase. Skip the dealer markup.

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2008 Mercedes-Benz R-Class reflects Mercedes-Benz's published service intervals and the ASSYST Plus (Service A / Service B) system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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