2015 Mercedes-Benz S550 Engine Problems
- Complaints
- 3about this part
- Share
- 7%of 41 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine of the 2015 Mercedes-Benz S550, 7% of the 41 complaints for this model year. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Brought my vehicle to my mechanic because of noise that recently appeared in my car. To my surprise the mechanic stated that my engine is completely failing and would require an entire new engine. I purchased this car less than two years ago with an estimated 79,000 miles. Vehicle currently has an estimated 112,000 miles. Never missed a service interval for the vehicle. Now several components of the engine are completely failing.”
NHTSA complaint #11655140, filed 2025-04“I drove my 2015 mercedes benz S550 4matic approximately 20 miles to work, parked in the parking lot and about 30 minutes later, I was alerted by pembroke pines police (case# pppd22off050792) that my car was burning when I got to the parking lot pembroke pines fire dept was in the process of extinguishing a catastrophic fire in the engine compartment. The car drove problem free to that point. No warning lights, no smoke, no smell, no leak.the car was in excellent condition prior to the fire with approx 93000 miles. …”
NHTSA complaint #11492024, filed 2022-11“Cylinder wall 2 and 3 scorn horribly. Coolant leaking into cylinder 2 & 3. Dealer recommendation of new motor due to bad block. German Auto Works and CarStoreUSA Wichita KS both recommend new motor and have advised of many of same motors being recalled by Mercedes Benz. I also spoke with Mercedes Benz North America. The heads were replaced in 2022 already and have under 10k miles on motor since repair.”
NHTSA complaint #11642566, filed 2025-02Related service bulletins
- 11034064Jun 19, 2026Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline…
- 11008064Aug 9, 2024In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class…
- 11031736Sep 6, 2023In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA ("MBUSA") is extending…
- 11031590Sep 6, 2023This NCU replaces the prior NCU issued on March 10, 2023, and contains clarification on reimbursement timeline and removal of damage codes related to intake valves/guide.
- 11031608Jan 27, 2022Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2015-2017 Mercedes-Benz S-Class (222 and 217 platforms)…
- 11031734Feb 21, 2020The purpose of this letter is to advise you of additional benefits that Mercedes-Benz USA, LLC ("MBUSA") is providing to you regarding your vehicle ownership.
- 10058563Jul 6, 2015Xentry (mercedes): stored in engine control unit (ecu) is fault to exhaust back pressure sensor causing engine to be in limp home mode and diagnosis warning lamp activated. Model…
- 10135607Mar 11, 2015Update Transmission and Engine Control Module Software
Engine: other model years
Other parts of the 2015 Mercedes-Benz S550
7 complaintsSeat belts
7 complaintsElectrical system
5 complaintsBody and structure
5 complaintsWheels
5 complaintsAir bags
4 complaintsSteering
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBrakes
3 complaintsFuel system
3 complaintsTires
2 complaintsForward collision avoidance
1 complaints
← All problems reported for the 2015 Mercedes-Benz S550
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology