2017 Mercedes-Benz Sl550 problems, complaints & recalls
Most-reported problem areas: Steering (1) · Service Brakes (1) · Power Train (1)
Safety recalls (1)
Communication: Auto Crash Notification 2021-02-05 · campaign 21V058000 · 1,292,258 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.
Risk: Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
Fix: MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.
Service bulletins (70)
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.
Power Train 2026-09-26 · LI27.00-P-073124 · Service Bulletin/Repair Instructions
complaint customer complaints relating to automatic transmission 725.0 (nag3 classic /9g‑tronic automatic transmission) and 725.1 (nag3 facelift/9g‑tronic automatic transmission facelift) for faster, more effective and more targeted diagnosis, intelligent predictive repair (ipr) has been developed a
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,
Power Train 2026-09-14 · LI27.10-P-075869 · Service Bulletin/Repair Instructions
complaint only vehicles with a variable transfer case are affected. this can be identified through control unit n45 or n15/7 in the quick test. when accelerating with light load, vibrations or jolting sensation may come from the drivetrain. it may be mistaken for a harsh shift. cause modified oil qu
Power Train 2026-09-04 · LI27.00-P-073124 · Service Bulletin/Repair Instructions
complaint customer complaints relating to automatic transmission 725.0 (nag3 classic / 9g‑tronic automatic transmission) and 725.1 (nag3 facelift/9g‑tronic automatic transmission facelift) for faster, more effective and more targeted diagnosis, intelligent predictive repair (ipr) has been developed
Steering 2026-08-28 · LI46.35-P-067339 · Service Bulletin/Repair Instructions
complaint during part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. or rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). complaint does not impact the ability to safely steer or control
Showing the 6 most recent of 70 bulletins. Search all of them free at nhtsa.gov.
What owners report
2025-05-30 · Power Train“when pulling into an intersection after stopping at a 3-way stop the car unexpectedly went into neutral gear. an oncoming car had to stop suddenly to avoid a collision. i was able to shift the car back to drive and got it home. now the car will not start and there's a warning message on the dash saying to get the car to a dealer. the car is now …”
2022-08-03 · Service Brakes“2007 mercedes benz sl500. consumer writes in regard to brake failure. the consumer stated while approaching a stop sign the brakes failed to engage. the vehicle rolled through the stop sign. the vehicle experienced a catastrophic failure of the sensotronic braking control. the vehicle fault codes were 5611, c26de, c26bb, and c25d5. the codes were …”
2021-03-02 · Electrical System“2017 mercedes benz sl 550. consumer writes in regards to defective pre safe option on vehicle. *ld the consumer states the safety belts tighten restricting and distracting the driver when it is unnecessary to do so. the failure occurs in one particular spot where two metal plates overlap in the street. *js…”
2021-01-23 · Steering · 42,675 mi“steering wheel stuck in up position. it would not adjust to the preset upon entering the vehicle. found a fix online turned off the easy entry/exit feature and had to slap the wheel downward to get it unstuck. if this happens in motion it could lead to loss of control and driving with the wheel in full up position blocks the instruments.…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.