Total Complaints
23 filings
MERCEDES-BENZ SL CLASS · model year
2003 MERCEDES-BENZ SL CLASS
23 NHTSA complaints, 2 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2003MERCEDES-BENZSL CLASS carries 23 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 2 crashes, 1 fire, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2003 SL CLASS is service brakes, hydraulic with 2 filings, followed by suspension (2) and visibility:defroster/defogger/hvac system:heater core (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 15 investigation files overlapping the 2003 SL CLASS. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
23
Complaints
2
Crashes
1
Fires
0
Injuries
0
Deaths
Crashes Reported
2 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| SERVICE BRAKES, HYDRAULIC | 2 |
| SUSPENSION | 2 |
| VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE | 1 |
| STRUCTURE:BODY:DOOR | 1 |
| POWER TRAIN:AUTOMATIC TRANSMISSION | 1 |
| ELECTRICAL SYSTEM:WIRING | 1 |
| EXTERIOR LIGHTING:BRAKE LIGHTS | 1 |
| AIR BAGS | 1 |
| TIRES | 1 |
| INTERIOR LIGHTING | 1 |
| ENGINE AND ENGINE COOLING:ENGINE | 1 |
| STRUCTURE:BODY:DOOR:HINGE AND ATTACHMENTS | 1 |
| STRUCTURE:BODY:ROOF AND PILLARS | 1 |
| BACK OVER PREVENTION:WARNINGS:EXTERNAL/PEDESTRIAN ALERT | 1 |
| VISIBILITY:GLASS, SIDE/REAR | 1 |
Recent Complaints
20131120SERVICE BRAKES
MY WIFE WAS DRIVING ABOUT 1/2 MILE FROM OUR HOUSE WHEN THE BRAKES COMPLETELY FAILED. SHE WAS ON A BACK ROAD AND HAD TO BRAKE FOR A STOP SIGN. SHE WAS ABLE TO PULL OFF ON THE SIDE OF THE ROAD, TO AVOID REAR ENDING A CAR STOPPED AT THE STOP SIGN, AND FINALLY BRING THE CAR TO A STOP. THE BRAKES STARTED TO WORK WITH ABOUT 1" OF PEDAL FROM THE FLOOR. SHE SAID IT WAS SO HARD TO PUSH ON THE PEDAL THAT SHE COULD BARELY DO IT. LUCKILY SHE WAS NOT HURT. HAD THIS HAPPENED ON A MAJOR ROAD OR HIGHWAY THE RESULTS COULD HAVE BEEN CATASTROPHIC. APPARENTLY THIS WAS THE FIRST YEAR FOR A NEW BRAKING SYSTEM REFERRED TO A "DRIVE BY WIRE". EURO MOTORCARS IN MD INFORMED ME THAT BECAUSE MERCEDES HAD SO MUCH TROUBLE WITH THIS NEW SYSTEM THAT THEY EXTENDED THE WARRANTY FOR THIS PROBLEM FOR 10 ADDITIONAL YEARS. THE NEW EXTENDED WARRANTY ON THIS BRAKE FAILURE ISSUE WAS FOR COMPLETE PARTS AND LABOR. I WAS NEVER NOTIFIED OF THIS EXTENDED WARRANTY. NO ONE AT THE DEALERSHIP, WHERE I HAVE HAD THE CAR SERVICED
Mileage: 71,525
20080424FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
NO INCIDENT. WAS DRIVING AND AS I PULLED INTO MY DRIVEWAY, HEARD BUMPING SOUND FROM CAR. ASKED MERCEDES WHAT IT WAS, THEY SAID LOOSE BAFFLE IN GAS TANK. SOUNDS LIKE MANUFACTURING DEFECT. CHECKED ONLINE AND FOUND MANY OTHERS WITH SAME PROBLEM. IT IS A COSTLY REPAIR JUST OUTSIDE OF WARRANTY PERIOD. *TR
Mileage: 43,300
20051115SUSPENSION
I PURCHASED A 2003 MERCEDES BENZ SL500 IN DECEMBER OF 2003. AS OF TODAY 8 NOVEMBER 2005, THE SUSPENSION APPARENTLY CAN NOT BE REPAIRED. THE CAR HAS BEING TAKEN BACK TO THE DEALER FOR THE EIGHT (8TH) TIME TO REPAIR THE SUSPENSION. IT IS CURRENTLY ALEXANDRIA VIRGINIA, MERCEDES BENZ AS OF NOVEMBER 9TH, 2005. WHILE DRIVING THE VEHICLE HOME FROM A DINNER ENGAGEMENT, LATE OCTOBER 2005, ONE OF THE FRONT HYDRAULIC SHOCK DROPPED AND THE VEHICLE LITERALLY CHANGED LANES. FORTUNATELY, NO CARS WERE BESIDE ME AT THE TIME. I AM WRITING TO THE NHTSA TO GET THEIR ASSISTANCE IN DETERMINING THE FEASIBILITY OF DRIVING THIS VEHICLE WITH ITS UNPREDICTABLE LEVEL OF SAFETY. I AM APPALLED BY MERCEDES BENZ LACK OF CONCERN TO REPLACE THIS VEHICLE, THE MANUFACTURER OR THEIR REPRESENTATIVES, ARE UNABLE TO REPAIR IT. I REQUEST YOUR ASSISTANCE TO DETERMINE MY NEXT STEPS OR ANY ACTIONS YOU CAN TAKE TO COMPEL THE MANUFACTURER TO RESOLVE THIS MATTER. *JB
Mileage: 23,000
20050430ELECTRICAL SYSTEM
I TURNED KEY AND CAR DID NOT START. I ENDED UP GETTING STUCK EITHER AT HOME OR IN A SHOPPING CENTER. CAR HAD TO BE PUT ON A FLAT BED. DEALER RELPACED PARTS EACH TIME , BUT COULD NOT FIND THE CAUSE OF THE PROBLEM.
20050407CrashENGINE AND ENGINE COOLING:EXHAUST SYSTEM
2003 MERCEDES BENZ SLK 320 EXPERIENCING PROBLEMS WITH HESITATION WHEN THE ACCELERATOR IS DEPRESSED.*MR ON ONE OCCASIONS WHEN THE CONSUMER ATTEMPTED TO APPLY THE GAS THE VEHICLE DID NOT MOVE FOR A FEW SECONDS AND THEN ALL OF A SUDDEN THE VEHICLE LURCHED FORWARD AND THE CONSUMER HIT ANOTHER VEHICLE. THE THERE WAS ALSO A RATTLE IN THE EXHAUST. *JB
20050407CrashVEHICLE SPEED CONTROL
2003 MERCEDES BENZ SLK 320 EXPERIENCING PROBLEMS WITH HESITATION WHEN THE ACCELERATOR IS DEPRESSED.*MR ON ONE OCCASIONS WHEN THE CONSUMER ATTEMPTED TO APPLY THE GAS THE VEHICLE DID NOT MOVE FOR A FEW SECONDS AND THEN ALL OF A SUDDEN THE VEHICLE LURCHED FORWARD AND THE CONSUMER HIT ANOTHER VEHICLE. THE THERE WAS ALSO A RATTLE IN THE EXHAUST. *JB
20041013POWER TRAIN:AUTOMATIC TRANSMISSION
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013ELECTRICAL SYSTEM:WIRING
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013EXTERIOR LIGHTING:BRAKE LIGHTS
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013AIR BAGS
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013TIRES
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013INTERIOR LIGHTING
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013ENGINE AND ENGINE COOLING:ENGINE
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013STRUCTURE:BODY:DOOR:HINGE AND ATTACHMENTS
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013STRUCTURE:BODY:ROOF AND PILLARS
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013BACK OVER PREVENTION:WARNINGS:EXTERNAL/PEDESTRIAN ALERT
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013VISIBILITY:GLASS, SIDE/REAR
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013SERVICE BRAKES, HYDRAULIC
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013SUSPENSION
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
20041013VISIBILITY:WINDSHIELD WIPER/WASHER
THE VEHICLE (2003 MB SLK320) WAS PURCHASED ON 4/14/2004 IN AZ AND BEGAN NOTICING PROBLEMS ON THE DRIVE BACK TO NM. THE MOST SIGNIFICANT SAFETY PROBLEM INVOLVES THE TRANSMISSION, WHICH HAS BEEN SERVICED BY THE MANUFACTURER 8 TIMES WITHOUT RESOLUTION. THE VEHICLE SLIPS IN AND OUT OF GEAR AT HIGHWAY SPEEDS. THE VEHICLE HAS SPENT A TOTAL OF OVER 68 DAYS IN THE SHOP FOR UNSATISFACTORY REPAIRS IN A ONE-YEAR PERIOD. TO THIS DATE, THE MANUFACTURER HAS BEEN UNCOOPERATIVE IN RESOLVING THESE PROBLEMS FORCING ME TO SEEK LEGAL SERVICES.*AK
Mileage: 9,132
Compare 2003MERCEDES-BENZSL CLASS to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2003 MERCEDES-BENZ SL CLASS have?▼
The 2003 MERCEDES-BENZ SL CLASS has 23 NHTSA complaints, 2 crashes, 1 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 2003 MERCEDES-BENZ SL CLASS?▼
The most-complained component for the 2003 MERCEDES-BENZ SL CLASS is SERVICE BRAKES, HYDRAULIC with 2 complaints. Other frequently reported areas include SUSPENSION and VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE.
Is the 2003 MERCEDES-BENZ SL CLASS safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.