2004 Mercedes Benz Sl500 problems, complaints & recalls
Most-reported problem areas: Suspension (14) · Service Brakes (6) · Fuel/Propulsion System (4)
🧭 Reliability snapshot
Compared against other Mercedes Benz Sl500 model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
36 NHTSA complaints that reported an odometer reading.
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (51)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
complaint repeat workshop visit for vehicle vibration while braking from 60mph. note: although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. cause although the cause of the vibra
Structure:body 2026-09-14 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Structure:body 2026-08-06 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Power Train 2026-07-14 · LI35.30-P-058566 · Service Bulletin/Repair Instructions
single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). the noise is heard once in each instance when changing direction of travel. note: sound file in attachment cause if the complaint is eliminated by experimentally loosening the outboard collar n
Visibility/Wiper 2026-05-19 · LI82.30-P-059239 · Service Bulletin/Repair Instructions
complaint there are several types of complaint about noises or poor windshield wiper wiping performance: a: wiper blades squeaking, chattering, shuddering b: the windshield is not wiped completely (streaking) c: during the downward movement water is pulled back onto the windshield from the a-pillar
Exterior Lighting 2026-04-16 · LI82.10-P-078301 · Service Bulletin/Repair Instructions
complaint headlamp, front fog lamp leaky or fogged. cause fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. it does not lead to any technical impairment of the headlamp. if a pressure compensation diaphragm is fitted in the housing cover, then the l
Showing the 6 most recent of 51 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-08-05 · Service Brakes, Hydraulic · 62,800 mi“the contact owns a 2004 mercedes-benz sl500. the contact stated that after starting the vehicle, the message "brakes reached historic threshold" was displayed, which indicated that the brake control unit had malfunctioned. additionally, while depressing the brake pedal, the brake pedal was spongy, causing the stopping distance to become extended. t…”
2026-01-24 · Service Brakes“question 1: the sensotronic brake control (sbc) unit, which is a high-pressure "brake-by-wire" hydraulic system. component a7/3. the component is currently installed in the vehicle and is available for inspection. question 2: the vehicle experienced a sudden, catastrophic loss of hydraulic brake pressure while in operation. this failure required e…”
2023-04-23 · Electrical System · 🔥 fire“the 2003-2006 r230 series seem to have a problem with the bcm (battery control module) as start an electrical fire in the trunk. very common issue and a safety hazard - this is what happened with my car. vehicle has dual battery, starter in front, convenience battery in trunk and fuses that operate at 130 amps - the bcm capacitors and circuit board…”
2022-05-07 · Fuel/Propulsion System“on many 2003 and 2004 models. broken fuel tank baffle inside fuel tank. this is well documented and could possibly cause explosion. …”
2020-07-30 · Fuel/Propulsion System · 118,000 mi“on july 22, 2020 the vehicle (2004 mercedes-benz sl500 (r230)began making a loud banging noise in the rear when stopping and turning. i delivered the vehicle to a local shop where the vehicle was diagnosed as having a broken baffle in the fuel tank. the only solution is to replace the entire fuel tank. many other owners of this model have experienc…”
2020-06-29 · Suspension · 92,000 mi“tl* the contact owns a 2004 mercedes-benz sl500. the contact stated on various occasions while his vehicle was stationery and in park, either the right side or the left side of the vehicle would raise up then descend to ground over a thirty second period independently without warning. the contact also stated that the hydraulic fluid leaked out of t…”
2020-06-02 · Fuel/Propulsion System · 88,620 mi“i experience a strong odor of fuel when entering my vehicle and when driving the vehicle, also when driving the vehicle i heart a loud thumping sound coming from the trunk area. sounds to me as though something is floating inside gas tank. this odor has sickened me and has severely upset my stomach to the point that i'm unable to drive my vehicle e…”
2019-05-18 · Unknown Or Other · 60,000 mi“the vehicle has a bracket on top of the gas tank that comes disengaded and causes this distinctive noise which sounds like something swinging and tapping against the gas tank and i has to happen a lot due to every service i have been asked about the problem. it also has to be something with multiple vehicles due to online mercedes owners are havin…”
2019-02-01 · Suspension · 61,000 mi“i submitted via fax earlier this week a formal letter to mr. exler the president & ceo of mbusa and, cc'd mr. king of the nhtsa that included information about known critical safety issued these vehicles had prior to mbusa importing them to the united states. mbusa failed to disclose these known issues and, chose to importation these vehicles viol…”
2018-12-06 · Fuel/Propulsion System · 144,000 mi“tl* the contact owns a 2004 mercedes-benz sl500. when the vehicle was started, the contact heard an abnormal knocking sound underneath the vehicle near the fuel tank. additionally, there was a constant fuel odor inside the vehicle. the vehicle was taken to mercedes-benz of virginia beach (located at 4949 virginia beach blvd, virginia beach, va 2346…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.