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2006 Mercedes-Benz CLS-Class Recalls, Problems & Maintenance

The 2006 Mercedes-Benz CLS-Class has no open NHTSA recalls. Owners report 5 recurring issue clusters, led by “Fuel sending unit leak and cabin gasoline odor.” 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 2006 Mercedes-Benz CLS-Class.

Reported to NHTSA

Fuel sending unit leak and cabin gasoline odor

FUEL/PROPULSION SYSTEM

50 NHTSA complaints · 2011-12 → 2022-04

“I AM AMONG THE HUNDREDS OF COMPLAINTS I HAVE READ ABOUT WITH MERCEDES FUEL TANKS LEAKING. I HAVE A CLS55 AND FOR THE LAST 2+ YEARS I HAVE BEEN ARGUING WITH MERCEDES ABOUT A VERY STRONG FUEL SMELL INSIDE AND OUT OF THE VEHICLE”
— Owner report, NHTSA ODI #10578758
“FUEL SENDING UNIT LEAKS AFTER FILLING UP GAS TANK. HOLDS THE RAW GAS IN TOP OF SENDING UNIT. CAUSES INSIDE OF CAR TO FILL UP WITH RAW GAS SMELL, GETS REALLY BAD ON HOT DAYS”
— Owner report, NHTSA ODI #10537274
“TL* THE CONTACT OWNS A 2006 MERCEDES BENZ CLS500. THE CONTACT STATED THAT FUEL WAS CONTINUOUSLY LEAKING FROM UNDER THE FRONT DRIVER'S SIDE SEAT”
— Owner report, NHTSA ODI #10565824

Read all complaints on NHTSA →

Wheel rim cracking and tire failure

WHEELS

12 NHTSA complaints · 2005-10 → 2022-11

“THE CONSUMER HAD TO REPLACE THREE WHEELS AND ONE TIRE IN LESS THAN THIRTY DAYS AFTER PURCHASING THE 2006 MERCEDES BENZ CLS55”
— Owner report, NHTSA ODI #10130172
“MY 2006 MERCEDES CLS55 AMG HAS HAD 6 DENTED RIMS WITHIN THE FIRST 13 MONTHS (11,000 MI)”
— Owner report, NHTSA ODI #10181047
“WHILE DRIVING ON THE FREEWAY AT 65MPH, I HEARD A LOUD THUMP. IMMEDIATELY EXITED ON THE NEAREST OFF RAMP, THINKING THAT I HAD A FLAT TIRE”
— Owner report, NHTSA ODI #10456902

Read all complaints on NHTSA →

Transmission slipping and shift-lock malfunction

POWER TRAIN

4 NHTSA complaints · 2006-10 → 2009-05

“I HAVE A 2006 MERCEDES-BENZ CLS500. WHEN FACED OR PARKING DOWNWARDS ON A HILL, THE CAR ROLLS FORWARD WHEN YOU ATTEMPT TO CHANGE GEARS”
— Owner report, NHTSA ODI #10184563
“DT*: THE CONTACT STATED WHILE DRIVING 15 MPH, THE TRANSMISSION SLIPPED INTO NEUTRAL”
— Owner report, NHTSA ODI #10170905
“TL*THE CONTACT OWNS A 2006 MERCEDES BENZ CLS500. ON OCTOBER 7, 2006, THE CONTACT TOOK HIS VEHICLE TO THE DEALER BECAUSE THE TRANSMISSION WAS SLIPPING”
— Owner report, NHTSA ODI #10191306

Read all complaints on NHTSA →

Sensotronic Brake Control pedal-to-floor failure

SERVICE BRAKES

33 NHTSA complaints · 2006-08 → 2026-09

“The 2006 Mercedes Benz CLS500 was designed with a SBC braking system that uses a microcomputer to monitor the car and driver actions”
— Owner report, NHTSA ODI #11448635
“No notice Brake Failure. Coming up to the corner of my sub-division before making a right turn onto a busy 4 lane road, Stepped on the brakes and nothing happened !”
— Owner report, NHTSA ODI #11443620
“TL* THE CONTACT OWNS A 2006 MERCEDES-BENZ CLS500. WHILE DRIVING 70 MPH, THE "REDUCE BRAKE" AND "STOP THE VEHICLE" INDICATORS ILLUMINATED”
— Owner report, NHTSA ODI #11056058

Read all complaints on NHTSA →

Unintended acceleration with airbag non-deployment

AIR BAGS, VEHICLE SPEED CONTROL

4 NHTSA complaints · 2007-11 → 2018-01

“PULLING INTO PARKING SPACE CAR ACCELERATED AND HIT TREE. AIR BAGS DID NOT INFLATE AND SATELLITE DID NOT NOTIFY POLICE. COULD NOT STOP VEHICLE”
— Owner report, NHTSA ODI #10207663
“TL* THE CONTACT OWNS A 2006 MERCEDES-BENZ CLS500. THE CONTACT REAR ENDED ANOTHER VEHICLE WHILE DRIVING AT AN UNKNOWN SPEED. THE AIR BAGS DID NOT DEPLOY”
— Owner report, NHTSA ODI #11058048
“I WAS DRIVING DOWN I-10 ON WEDNESDAY, SEPTEMBER 8TH, 2010 BETWEEN 5:10 AND 5:15 P.M. AND ALL OF A SUDDEN MY CAR TOOK OFF AT SPEEDS OVER 100MPH OUT OF CONTROL”
— Owner report, NHTSA ODI #10363342

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)

18 crashes 1990–2024

How the 18 occupant deaths break down

15

driver deaths

3

passenger deaths

18

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2008 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.

3

complaints mentioning a crash

0

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 2006 Mercedes-Benz CLS-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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