2003 Mercedes-Benz SL

Typical pattern

11.8% of complaints about the 2003 Mercedes-Benz SL came in the first year, which is unremarkable for a 2003 vehicle — around the middle of the 228 model-years on record. The median complaint arrives at 10.8 yr in service. The most-reported system is suspension (40 complaints), typically at 12.3 yr or about 62,859 miles.

Covers 2 variants: SL500 (108), SL CLASS (23)

Complaints: 144
Median age at failure: 10.8 yr
Median mileage: 57,000 n=123
Crash / fire / tow: 10.4% of reports
Safety recalls: 0

In owners’ own words

Suspension 58,000 mi 9.9 yr in service

FAILURE OF ACTIVE BODY CONTROL HYDRAULIC SUSPENSION SYSTEM; PUMP AND WHEEL VALVE FAILURES RESULTING IN LOSS OF HYDRAULIC FLUID AND RESULTING LOSS OF ABILITY OF CAR TO MAINTAIN SAFE VEHICLE HEIGHT AND SAFE DRIVABLE. *TR

Suspension 9,132 mi 9 mo in service

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

Suspension 49,820 mi 6.6 yr in service

2003 MERCEDES BENZ 500SL DRIVING DOWN THE ROAD THE CAR JUST DROPPED DOWN , THE ACTIVE BODY CONTROL SYSTEM FAILED IT RUINED THE UNDERCARRIAGE OF THE VEHICLE THE CAR DOES NOT EVEN HAVE 50,000 MILES ON IT. IT'S HARD TO GET IT TOWED. IT IS VERY LOW AND IT CAN CAUSE A VERY SERIOUS ACCIDENT , THE FUNNY THING WAS THE NEXT DAY STARTED THE CAR UP THE CAR CAME UP BUT KNOWING MY UNDERCARRIAGE IS DESTROYED . I HAD COUPLE INCIDENTS HAPPEN TO MEN LUCK I WAS NOT ON THE FREEWAY. IT ALSO THROWS YOUR ALIGNMENT OUT. *TR

Other SL model years

How to read this

This is what owners reported, not a reliability rating. People file with NHTSA about alarming failures, not routine ones, and complaint volume tracks how many cars were sold.
Failure ages come from the incident date on each complaint, populated on about 83% of records. Mileage is shown where reported — NHTSA’s 2021 system change cut mileage capture to roughly 15%, so it thins out sharply after MY2020.
Every rank compares this vehicle only against others of the same model year. A 2025 car has not had time to accumulate five-year failures, so comparing early-failure share across years is meaningless.
Fourteen make-months distorted by media storms and mass recalls — Toyota in February 2010 ran 11× normal volume across 33 models — are excluded.
Recalls are manufacturer actions and authoritative; complaints are not. A recall listed here may already have been performed on any individual car. Check a specific VIN at nhtsa.gov/recalls.

2003 Mercedes-Benz SL

When each system is reported — middle 50% of complaints

In owners’ own words

Other SL model years

How to read this