2014 Mercedes-Benz S550 Service and Repair Manual

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Factory-Grade Data

2014 Mercedes-Benz S550 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • Base Sedan 4-Door
  • 4Matic Sedan 4-Door

Engines covered

  • 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Payment methods

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  • Visa

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Vehicle Safety Data

2014 Mercedes-Benz S550 Recalls & Complaints

NHTSA #13V57600020/11/2013Component: SEAT BELTS:FRONT:ANCHORAGE

Mercedes-Benz USA, LLC (Mercedes-Benz) is recalling certain model year 2014 S550 vehicles manufactured April 11, 2013, through October 14, 2013. In the affected vehicles, the front seat belt anchor m

Consequence

If the seat belt anchor comes loose, in the event of a crash, the occupant may not be properly secur

Remedy

Mercedes-Benz will notify owners, and dealers will inspect and correct the front seat belt anchor fi

NHTSA #21V19700019/03/2021Component: STRUCTURE:BODY:ROOF AND PILLARS

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2020 C300 Coupe, C43 Coupe AMG, C43 AMG, 2015-2020 C300, GLA250, 2016-2018 C350e, CLA45 Coupe AMG, 2015 C400, S65 AMG, 2015-2019 C63 AMG, 2016

Consequence

The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detac

Remedy

Mercedes-Benz dealer will remove the bonded panel and will install a new front panel by following th

NHTSA #23V85400015/12/2023Component: STRUCTURE:BODY:ROOF AND PILLARS

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014-2020 C-Class, CLA, GLA, S-Class, GLC, and GLE vehicles. Please refer to MBUSA's recall report for specific vehicle details. The front roof pa

Consequence

A detached roof panel can become a road hazard, increasing the risk of a crash.

Remedy

Dealers will replace the front panel, free of charge. Owner notification letters were mailed on Aug

NHTSA #16V89900014/12/2016Component: STEERING:ELECTRIC POWER ASSIST SYSTEM

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2013-2015 SL550, 2013-2014 SL63 AMG, 2014-2016 E350, 2014 E350 Cabriolet, E350 Coupe, 2014-2015 S550, 2015 E350 Bluetec, 2015-2016 E400,

Consequence

If the control unit pins lose connection, there would be a loss of electric power steering assist, i

Remedy

MBUSA will notify owners, and dealers will replace the electric power steering control unit, free of

NHTSA #19V78700001/11/2019Component: COMMUNICATION

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date an

Consequence

An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.

Remedy

MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers

TSB #11031736

In 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 the coverage for the exhaust valve assembly on your vehicle as f

TSB #11031590

This 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. In our continuing efforts to assure the proper performance of Mercede

TSB #11031580

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 compe

TSB #11029959

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 compen

TSB #11029062

Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment o

TSB #11029025

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 compen

TSB #11028989

Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment o

TSB #11027682

Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy AC Diagnosis (General) Initial Steps Verify Customer Concern Confirm the issue reported by the custom

Showing the 8 most recent of 125 technical service bulletins on file with NHTSA.

20140327Component: STRUCTURE:BODYCrash reported1 injured

I PURCHASED A NEW 2014 MERCEDES S550 AND THE DAY AFTER PURCHASE, THE AIRBAG MALFUNCTION LIGHT CAME ON. I SET UP AN APPOINTMENT TO HAVE THIS CORRECTED, AND WAS TOLD IT WAS FIXED. A COUPLE OF WEEKS LA

20140327Component: AIR BAGSCrash reported1 injured

I PURCHASED A NEW 2014 MERCEDES S550 AND THE DAY AFTER PURCHASE, THE AIRBAG MALFUNCTION LIGHT CAME ON. I SET UP AN APPOINTMENT TO HAVE THIS CORRECTED, AND WAS TOLD IT WAS FIXED. A COUPLE OF WEEKS LA

20140327Component: ELECTRICAL SYSTEMCrash reported1 injured

I PURCHASED A NEW 2014 MERCEDES S550 AND THE DAY AFTER PURCHASE, THE AIRBAG MALFUNCTION LIGHT CAME ON. I SET UP AN APPOINTMENT TO HAVE THIS CORRECTED, AND WAS TOLD IT WAS FIXED. A COUPLE OF WEEKS LA

20190923Component: AIR BAGSCrash reported

TL* THE CONTACT OWNED A 2014 MERCEDES-BENZ S550. WHILE THE CONTACT'S VEHICLE WAS IDLING AT A RED LIGHT, ANOTHER VEHICLE RAN A STOP SIGN AND T-BONED HIS VEHICLE. NONE OF THE FRONTAL AIR BAGS DEPLOYED.

20151221Component: UNKNOWN OR OTHERCrash reported

BACKUP LIGHTS ON THIS CAR ARE TOTALLY USELESS. DEALER SAYS NO BRIGHTER BULBS ARE AVAILABLE. DANGEROUS SITUATION. BACKED INTO A MAILBOX AND DID $700.00 IN DAMAGE. PLEASE ADVISE WHAT I SHOULD DO.

Showing the 5 most serious of 36 complaints filed with NHTSA.

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