RoadVitals

2008 Mercedes-Benz CLS550 Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
17
Latest Jan 24, 2025
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
11
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
0

What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2008 Mercedes-Benz CLS550, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

  • Fuel system523.8%
  • Airbags314.3%
  • Electrical314.3%
  • Suspension29.5%
  • Engine29.5%
  • Exterior lighting14.8%
  • Powertrain (other)14.8%
  • Steering14.8%
  • Tires & wheels14.8%
  • Driver assistance14.8%
  • Brakes14.8%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Fuel system

Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.

5
reports

From owner reports, verbatim

The failed component of the car was the drivers side fuel transfer pump. After noticing the faint smell of gas in my car i checked under the rear driver side passenger seat. I was shocked to find more than 16 fluid ounces of gas floating freely around the well of the gas pump.the insulation under the rear passenger seat is soaked in gas. I can only imagine what could’ve happened if there was an accident or if someone even sparked a cigarette in my car. Not only is this extremely dangerous, there are negative consequences that result from inhaling gas constantly while driving. Gas contains cancerous properties, people should not be subject to unknowingly driving around a car that is manufactured to the defect of releasing cancerous vapors. Who knows what damage inhaling gas fumes for the past months has done to me or my passengers. In the even that someone were to spark a cigarette in the car it was possible that the car could’ve caught fire. The passengers in the rear right seats would be affected the most, the insulation under their seat is soaked in gas. This problem has possibly been noticed by dealers and identified in a warranty that expired on 4/24/2023. This warranty was issued for fuel tanks and fuel components. I am not sure whether the gas pump was affected but the gas pump alone constitutes a recall. This is a very common problem as well, apparently there are multiple youtube videos demonstrating gas leaks in the back seat. Upon contacting dealer I was informed that they did not know if the gas pump was included in a warranty that expired in 4/24/2023. I would have to pay for an inspection to determine if the gas pump is related to the warranty. In the case that it was related the financial obligation to repair is my burden. The dealer wont inspect the vehicle unless I pay, I have documented photo and video of the gas well and the extent of the leakage. There was no warning or any indication that I was driving around with this dangerous issue.

NHTSA ID 11638320 · filed Jan 24, 2025

LEAKING FUEL AROUND THE FUEL SENDING UNIT UNDER REAR SEAT BEHIND DRIVER, FILLING THE PASSENGER COMPARTMENT WITH GASOLINE FUMES, AFTER FILLING THE CAR UP WITH GASOLINE.

NHTSA ID 10926259 · filed Nov 15, 2016

Too few reports in this category for a page of its own — they appear in the full complaint list.

Airbags

Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.

3
reports

From owner reports, verbatim

MY AIRBAGS DEPLOYED AFTER ON DAY OF DRIVING HOME FROM A DAY BABYSITTING MY NIECE AND NEPHEW I GOT HOME PARKED MY CAR IN THE GARAGE AND THAT WHOLE NIGHT FROM 11 AT NIGHT UNTILL ABOUT 330 IN THE MORNING THE LOUDEST SOUND I'VE EVER HERD THE EQUIVALENT OF A BOMB DETONATION EXPLOSION WENT OFF AND IM 10 15 FEET AWAY PAINTING MY GARAGE AND NEXT THING I KNOW I LOOK AT MY MERCEDES-BENZ CLS550 2008. ALL THE AIRBAGS IN THE ROOF AND BY THE BACK WINDOW DETONATING! I CANT UNDERSTAND WHY TO THIS DAY THE CAR WAS LOCKED KEYS WHERE IN MY ROOM IN THE HOUSE. AND I HAVE NO IDEA HOW THIS COULD OF HAPPENED. ! PLEASE GET AHOLD OF ME AT YOUR EARLIEST CONVENIENCE BECAUSE THIS IS ABSOLUTELY INSANE SOMETIMES LIKE THIS COULD HAPPEN IN A HIGH END LUXURY CAR. AGAIN IT'S A 2008 MERCEDES-BENZ CLS550. VIN# [XXX]. YOU CAN REACH ME IF YOU HAVE ANY QUESTIONS AT [XXX]. OR MY EMAIL [XXX]. THANK-YOU. THE CAR IS CURRENTLY AT ELITE MERCEDES BENZ GETTING LOOKED AT I WILL HAVE THEM SEND ME PHOTOS TO SEND TO IF YOU WOULD LIKE. REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *CC

NHTSA ID 11343649 · filed Aug 6, 2020

THE AIRBAGS LOCATED IN THE ROOF JUST DEPLOYED OUT OF NO WHERE WHEN I WAS ON MY WAY HOME FROM WORK ONLY THE 2 SIDE CURTAIN AIRBAGS

NHTSA ID 11217013 · filed May 31, 2019

Too few reports in this category for a page of its own — they appear in the full complaint list.

Electrical

Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.

3
reports

From owner reports, verbatim

I see there was a recall on instrument clusters on my vehicle in 2001. My instrument cluster is completely black and I can’t see speed or any thing at night. You cant replace the bulb or cluster unless mercedes reprogram it which the price is rediculous. I did some research and seen that Mercedes did some recalls for my vehicle but it doesn’t show up. I was told to contact you guys in regards to this.

NHTSA ID 11547230 · filed Sep 28, 2023

My doors will open without the keyfob being in close proximity to the vehicle. My car has been stolen d/t this feature. Also the electrical lighting system malfunctions causing dimmer lights especially when driving at night

NHTSA ID 11465666 · filed May 22, 2022

Too few reports in this category for a page of its own — they appear in the full complaint list.

Suspension

Reports naming suspension components — springs, struts, shocks, control arms and related hardware.

2
reports

From owner reports, verbatim

PLEASE ADVISE OF ANY MERCEDES BENZ RECALLS ON AIR SUSPENSION ISSUE WITH CLS CLASS VEHICLES, IN PARTICULAR, CLS550 MODEL. THERE SEEMS TO BE A RECURRING ISSUE WITH LEAK OR MALFUNCTION WITH HYDRAULIC AIR SUSPENSION CAUSING VEHICLE TO LEAN TO ONE SIDE AND INCUR WARNING OF "STOP VEHICLE IS TOO LOW".

NHTSA ID 10980150 · filed Apr 24, 2017

WHILE APPROACHING INTERSTATE ON RAMP BEGAN TO HEAR A LOUD WHISTLING SOUND COMING FROM THE FRONT LEFT WHEEL WELL. I PULLED OVER AND FOUND THE LEFT FRONT SUSPENSION BEGINNING TO SINK. THE STRUT LOWER TO A POINT WHERE THE BODY OF THE CAR WAS ONLY 2-3 INCHES ABOVE THE TIRE. WHEN I CHECKED THE DASHBOARD INDICATORS I HAD AN ERROR LIGHT INDICATING THAT THE VEHICLE WAS TOO LOW TO DRIVE. *TR

NHTSA ID 10604985 · filed Jun 21, 2014

Too few reports in this category for a page of its own — they appear in the full complaint list.

Engine

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.

2
reports

From owner reports, verbatim

TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ CLS550. THE CONTACT STATED THAT AT START-UP THE CHECK ENGINE WARNING LIGHT ILLUMINATED AND REMAINED ILLUMINATED. THE VEHICLE WAS NOT TAKEN TO BE DIAGNOSED NOR REPAIRED. THE LOCAL DEALER WAS NOT CONTACTED OR INFORMED OF THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 100,000.

NHTSA ID 11341067 · filed Jul 23, 2020

I WAS DRIVING G THROUGH A PARKING LOT WHEN THE SERPENTINE BELT BROKE. NATURALLY, THE CAR BECAME DIFFICULT TO STEER BUT MANAGEABLE. AS I ATTEMPTED TO TURN INTO A PARKING SPOT I HEARD A 'POP' UNDER THE HOOD. WHEN THIS OCCURRED, THE WHEEL WENT INTO A FREE SPIN. THERE WAS NO INPUT FROM THE STEERING WHEELS TO THE RACK AND PINION. UPON INVESTIGATION I FOUND THE LOWER STEERING SHAFT BROKEN ABOUT 2 INCHES ABOVE THE RACK SPLINE. THE STEERING SHAFT WAS BROKEN IN TWO. THE INCREASED FORCE REQUIRED TO TURN THE WHEEL WAS TOO MUCH FOR THE SHAFT TO HANDLE. *TR

NHTSA ID 10935341 · filed Dec 14, 2016

Too few reports in this category for a page of its own — they appear in the full complaint list.

Exterior lighting

Reports naming headlights, tail lights, turn signals and other exterior lighting.

1
report

From owner reports, verbatim

My doors will open without the keyfob being in close proximity to the vehicle. My car has been stolen d/t this feature. Also the electrical lighting system malfunctions causing dimmer lights especially when driving at night

NHTSA ID 11465666 · filed May 22, 2022

Too few reports in this category for a page of its own — they appear in the full complaint list.

Powertrain (other)

Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.

1
report

From owner reports, verbatim

I bought a 2008 mercedes cls and have had it for a while now and with no warning it has started making a banging noise while idling. It idles very rough and shakes my car. I'm unable to drive it safely at this point. The engine is also mimicking symptoms of an idler gear/ balance shaft wearing down due to poor building materials from factory allowing movement of the timing chain. Apparently causing the engine to blow. I don't know what to do now. I don't know if it is covered by mercedes. But I know I am not alone on needing this to become a recall...

NHTSA ID 11591644 · filed May 30, 2024

Too few reports in this category for a page of its own — they appear in the full complaint list.

Steering

Reports naming the steering system — racks, columns, power-steering assist and steering linkage.

1
report

From owner reports, verbatim

I WAS DRIVING G THROUGH A PARKING LOT WHEN THE SERPENTINE BELT BROKE. NATURALLY, THE CAR BECAME DIFFICULT TO STEER BUT MANAGEABLE. AS I ATTEMPTED TO TURN INTO A PARKING SPOT I HEARD A 'POP' UNDER THE HOOD. WHEN THIS OCCURRED, THE WHEEL WENT INTO A FREE SPIN. THERE WAS NO INPUT FROM THE STEERING WHEELS TO THE RACK AND PINION. UPON INVESTIGATION I FOUND THE LOWER STEERING SHAFT BROKEN ABOUT 2 INCHES ABOVE THE RACK SPLINE. THE STEERING SHAFT WAS BROKEN IN TWO. THE INCREASED FORCE REQUIRED TO TURN THE WHEEL WAS TOO MUCH FOR THE SHAFT TO HANDLE. *TR

NHTSA ID 10935341 · filed Dec 14, 2016

Too few reports in this category for a page of its own — they appear in the full complaint list.

Tires & wheels

Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.

1
report

From owner reports, verbatim

TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ CLS550 EQUIPPED WITH CONTINENTAL EXTREMECONTACT SPORT TIRES, SIZE: 245/40/ZR18 (NA). WHILE DRIVING 45 MPH, THE TPMS WARNING INDICATOR ILLUMINATED AND THE REAR PASSENGER TIRE BLEW OUT. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF STOCKTON (LOCATED AT 10777 TRINITY PKWY, STOCKTON, CA 95219, (209) 944-5511). THE CONTACT REQUESTED THAT THE TIRES BE REPLACED, BUT THE DEALER DECLINED TO ASSIST WITH HAVING THE VEHICLE REPAIRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE APPROXIMATE VEHICLE FAILURE MILEAGE WAS 98,000 AND THE APPROXIMATE TIRE FAILURE MILEAGE WAS 2,000.

NHTSA ID 11123486 · filed Aug 30, 2018

Too few reports in this category for a page of its own — they appear in the full complaint list.

Driver assistance

Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.

1
report

From owner reports, verbatim

MY AIRBAGS DEPLOYED AFTER ON DAY OF DRIVING HOME FROM A DAY BABYSITTING MY NIECE AND NEPHEW I GOT HOME PARKED MY CAR IN THE GARAGE AND THAT WHOLE NIGHT FROM 11 AT NIGHT UNTILL ABOUT 330 IN THE MORNING THE LOUDEST SOUND I'VE EVER HERD THE EQUIVALENT OF A BOMB DETONATION EXPLOSION WENT OFF AND IM 10 15 FEET AWAY PAINTING MY GARAGE AND NEXT THING I KNOW I LOOK AT MY MERCEDES-BENZ CLS550 2008. ALL THE AIRBAGS IN THE ROOF AND BY THE BACK WINDOW DETONATING! I CANT UNDERSTAND WHY TO THIS DAY THE CAR WAS LOCKED KEYS WHERE IN MY ROOM IN THE HOUSE. AND I HAVE NO IDEA HOW THIS COULD OF HAPPENED. ! PLEASE GET AHOLD OF ME AT YOUR EARLIEST CONVENIENCE BECAUSE THIS IS ABSOLUTELY INSANE SOMETIMES LIKE THIS COULD HAPPEN IN A HIGH END LUXURY CAR. AGAIN IT'S A 2008 MERCEDES-BENZ CLS550. VIN# [XXX]. YOU CAN REACH ME IF YOU HAVE ANY QUESTIONS AT [XXX]. OR MY EMAIL [XXX]. THANK-YOU. THE CAR IS CURRENTLY AT ELITE MERCEDES BENZ GETTING LOOKED AT I WILL HAVE THEM SEND ME PHOTOS TO SEND TO IF YOU WOULD LIKE. REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *CC

NHTSA ID 11343649 · filed Aug 6, 2020

Too few reports in this category for a page of its own — they appear in the full complaint list.

Brakes

Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.

1
report

From owner reports, verbatim

PARKING BRAKE INOPERATIVE AND A YELLOW PARK TRIANGLE WARNING AT LEFT CORNER OF THE DASHBOARD DISPLAY.

NHTSA ID 10937133 · filed Dec 22, 2016

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .