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2004 Mercedes-Benz S-Class Recalls, Problems & Maintenance

The 2004 Mercedes-Benz S-Class has no open NHTSA recalls. Owners report 6 recurring issue clusters, led by “Air suspension and Active Body Control leaks and drops.” 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.

Save this car as:

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 2004 Mercedes-Benz S-Class.

Reported to NHTSA

Air suspension and Active Body Control leaks and drops

SUSPENSION

9 NHTSA complaints · 2005-01 → 2017-03

“AIR SUSPENSION FAILED DUE TO CRACKS IN THE TOP OF THE FRONT STRUTS. THIS LEAD TO LOSS OF AIR PRESSURE, OVERLOAD AND FAILURE OF THE AIR COMPRESSOR. THE VEHICLE IS UNSAFE TO DRIVE AS THE FRONT OF THE CAR COULD NO LONGER BE SAFELY SUPPORTED BY THE SUSPENSION. *TR”
— Owner report, NHTSA ODI #10449204
“ISSUES WITH AIRMATIC SYSTEM. WILL NOT FUNCTION PROPERLY. CAR IS SITTING TOO LOW TO THE GROUND TO DRIVE SAFELY. ISSUES WITH PUMP. *TR”
— Owner report, NHTSA ODI #10564568
“THE FRONT SUSPENSION FALLS DOWN DURING COLD WEATHER, CAUSING THE FRONT OF THE VEHICLE TO SINK DOWN ON THE WHEELS. A WARNING LIGHT TURNS ON INFORMING THE DRIVER TO STOP THE VEHICLE. MANUFACTURER WAS CONTACTED BY OWNER.*AK”
— Owner report, NHTSA ODI #10109231

Read all complaints on NHTSA →

Instrument cluster illumination failure

ELECTRICAL SYSTEM

6 NHTSA complaints · 2014-10 → 2019-09

“MY INSTRUMENT CONTROL PANEL BACKLIGHTING EXPERIENCED AN ELECTRICAL MALFUNCTION RESULTING IN THE FAILURE TO ILLUMINATE THE GAUGES. THE CONDITION WAS DIAGNOSED BY MY INDEPENDENT MECHANIC ON 06/06/16. IN DOING SO HE INFORMED ME OF RECALL CAMPAIGN NUMBER 06V-028”
— Owner report, NHTSA ODI #10874041
“TL* THE CONTACT OWNS A 2004 MERCEDES-BENZ S430. WHILE DRIVING AT APPROXIMATELY 40 MPH, THE INSTRUMENT PANEL LIGHTING FAILED TO ILLUMINATE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE INSTRUMENT PANEL CONTROL MODULE FAILED”
— Owner report, NHTSA ODI #10870790
“TL* THE CONTACT OWNS A 2004 MERCEDES BENZ S500. WHILE DRIVING APPROXIMATELY 65 MPH, THE INSTRUMENT PANEL FAILED. THE DEALER STATED THAT THE INSTRUMENT CLUSTER NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED”
— Owner report, NHTSA ODI #10643349

Read all complaints on NHTSA →

Harsh shifting and valve body replacement

POWER TRAIN, VEHICLE SPEED CONTROL, FUEL/PROPULSION SYSTEM

4 NHTSA complaints · 2005-12 → 2012-06

“TL* THE CONTACT OWNS A 2004 MERCEDES BENZ S430. THE CONTACT STATED THAT THE VEHICLE JERKED WHILE CHANGING GEARS. THE VEHICLE WOULD ALSO UNEXPECTEDLY ACCELERATE AND DECELERATE”
— Owner report, NHTSA ODI #10460800
“WHILE CHANGING GEARS FROM 1ST TO 2ND GEAR VEHICLE SHIFTED HARSHLY AND ENTERED INTO A LIMP MODE”
— Owner report, NHTSA ODI #10458809
“TRANSMISSION VALVE BODY NEED REPLACEMENT AFTER ENTIRE TRANSMISSION WAS REPLACED @ 50,000 MILES. *TR”
— Owner report, NHTSA ODI #10411558

Read all complaints on NHTSA →

Shifter stuck in park

POWER TRAIN

2 NHTSA complaints · 2010-07 → 2017-03

“CAR STUCK ON PARK, WONT RELEASE GEAR DUE TO FAULTY PLASTIC SAFETY FEATURE THAT CRACKS OVER TIME DUE TO INFERIOR MATERIAL. HAVE TO REPLACE WHOLE GEAR BOX OR REMOVE SAFETY PIN WHICH CAN CAUSE AN ACCIDENT SINCE LEVER WILL SHIFT WHITOUT PRESSING BRAKE OR IGNITION ON”
— Owner report, NHTSA ODI #10966174
“2 WEEKS AGO THE SHIFTER ON THE CAR STARTED TO GET HARDER AND HARDER TO GET OUT OF PARK. LAST WEEK THE CAR'S SHIFTER WAS STUCK IN PARK POSITION AND DOES NOT MOVE. I HAD TO TOW THE CAR TO A MECHANIC AND THEY HAVE TO REPLACE THE WHOLE SHIFTER. *TR”
— Owner report, NHTSA ODI #10345601

Read all complaints on NHTSA →

Water intrusion at air cowl and floor with electrical faults

STRUCTURE

5 NHTSA complaints · 2005-12 → 2017-12

“DURING RAIN STORM, WATER SEEPEED INO AIR COWL INTO CABIN-PASSENGER SIDE- FLOODED FLOOR EVENTUALLY SAM ELECTRONIC MODULE UNDER FLOOR WAS DAMAGED AND SHUT OFF ELECTRONICS IN AUTOMOBILE WHILE DRIVING AT HIGH SPEED ON FREEWAY- WITH OUT POWER CONTROLS OPERATING IT MADE DRIVING AND”
— Owner report, NHTSA ODI #10733487
“A COMPLETE SHUTDOWN OF THE ELECTRICAL SYSTEM OCCURRED AFTER A RAIN. AS A RESULT I AM UNABLE TO DRIVE THE CAR. MERCEDES AUTHORIZED MECHANIC CITES "AIR INTAKE AT BLOWER INTAKE AREA WAS INVERTED AT INSTALLATION FROM THE FACTORY". THE CAR IS IN PROCESS OF BEING REPAIRED”
— Owner report, NHTSA ODI #10228707
“RAINING, VEHICLE LEAK OF WATER FROM STORM FRONT PASSENGER, LEFT AND RIGHT REAR PASSENGER FLOOR AREA COMPLETELY SOAKED WITH WATER. WATER RESULTED IN ELECTRICAL CONTROL PANEL SHORTAGE. NO BRAKE LIGHTS, NO SPEEDOMETER, INSTRUMENT PANEL FLICKERING”
— Owner report, NHTSA ODI #10145035

Read all complaints on NHTSA →

Trunk lid latch and trunk wiring harness failure

ELECTRICAL SYSTEM

4 NHTSA complaints · 2015-10 → 2019-12

“IF THE TRUNK LID IS MANUALLY LIFTED, IT MAY NOT REMAIN IN THE UP POSITION AND COULD CAUSE INJURY IF IT COMES DOWN WHILE SOMEONE IS REACHING INTO THE TRUNK. THIS HAPPENED TO ME SEVERAL TIMES”
— Owner report, NHTSA ODI #11289649
“THE TRUNK WIRING HARNESS HAVE WIRES THAT THE PROTECTIVE COVERING HAS SHRED AND ALL COME APART. CAUSING WRITERS TO TOUCH. LOCKS NOT TO LOCK. TRUCK WON'T OPEN AND LICENSE PLATES LIGHTS ARE OUT”
— Owner report, NHTSA ODI #10786265
“LICENSE PLAYE LIGHT OUT SHORT CAUSES SRS LIGHT TO COME ON AND HAVE TO BE REPROGRAMMED. THERE IS NOW AN SIS DEFECTIVE LIGHT DUE TO THE WIRING. MY TRUCK DOES NOT POWER CLOSE. HAPPENS AT ALL TIMES. AND WHILE TURNING IT CAUSED AN ERROR FOR TURN LIGHTS”
— Owner report, NHTSA ODI #10779591

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.

Fatal crash history & reported problems

Occupant deaths in fatal crashes (FARS)

12 crashes 1990–2024

How the 12 occupant deaths break down

8

driver deaths

4

passenger deaths

12

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2004 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.

Why we show driver deaths too

Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.

Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.

IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

2

complaints mentioning a crash

2

complaints mentioning a fire

Reviewed known issues for this vehicle

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 2004 Mercedes-Benz S-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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