2017 Mercedes-Benz C300 Service and Repair Manual

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Covers all 2017 C300 trims — 4Matic Convertible 2-Door, Base Sedan 4-Door, 4Matic Sedan 4-Door +3 more ·
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2017 Mercedes-Benz C300 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

  • 4Matic Convertible 2-Door
  • Base Sedan 4-Door
  • 4Matic Sedan 4-Door
  • Base Convertible 2-Door
  • Base Coupe 2-Door
  • 4Matic Coupe 2-Door

Engines covered

  • 2.0L 1991CC l4 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
NHTSA #18V85000029/11/2018Component: STEERING:RACK AND PINION:RACK

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2015-2016 Mercedes Benz C300, 2017-2019 C300 Cabrio, C300 Coupe, C63 Cabrio, 2015 C63S AMG, 2018-2019 C300, C350e, C63 AMG, C63S AMG Cabrio, 2018 C6

Consequence

A car that cannot be properly steered has an increased risk of a crash.

Remedy

MBUSA will notify owners, and dealers will replace the steering rack, free of charge. The recall be

NHTSA #21V03200029/01/2021Component: SEAT BELTS:FRONT:RETRACTOR

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2021 C300, 2017-2020 AMG C43, and AMG C63 vehicles. The front seat belts might not fully retract to their stowed position. As such, these veh

Consequence

If the seat belt does not fully retract, the occupant may find the operation of the seat belt inconv

Remedy

MBUSA will notify owners, and dealers will check the retraction function of the front seat belts and

NHTSA #17V11400023/02/2017Component: ELECTRICAL SYSTEM:STARTER ASSEMBLY

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2015-2017 C300 4Matic, C300, CLA250, CLA250 4Matic and CLA45 AMG vehicles, 2017 C300 4Matic Cabrio, C300 4Matic Coupe, C300 Cabrio, C300 Coupe, E30

Consequence

If the starting current limiter overheats, the surrounding components can melt, increasing the risk

Remedy

MBUSA will notify owners, and dealers will install an additional fuse in the electrical line to the

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 #21V07200012/02/2021Component: COMMUNICATION

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2019 C300, E300, 2018-2020 CLA250, 2020 CLS450, AMG E53, AMG GT53, GLE450, 2018 AMG E63, AMG GTA, 2017-2020 GLA250, GLC300, 2019 GLC350, AMG GL

Consequence

A disabled eCall system would prevent a vehicle occupant from contacting emergency services through

Remedy

MBUSA will notify owners, and dealers will inspect the communication module and activate it, if nece

NHTSA #17V24300011/04/2017Component: STEERING:ELECTRIC POWER ASSIST SYSTEM

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2016-2017 C300 vehicles. The electrical contacts for the power steering electric motor may not have been properly welded, possibly resulting in a

Consequence

A loss of electrical contact will cause the electric power steering assist to deactivate, increasing

Remedy

MBUSA will notify owners, and dealers will replace the electric power steering rack, free of charge.

NHTSA #17V25100011/04/2017Component: SEAT BELTS:PRETENSIONER

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 C300, C300 4Matic, C300 Coupe, C300 Coupe 4Matic, C43 AMG, C43 AMG Coupe, C43 AMG Cabrio, C63 AMG, C63 AMG Coupe, C63S AMG, C63S AMG Coupe, C63

Consequence

If the front seat seatbelt pretensioners do not function properly, the seat occupants may not be ade

Remedy

MBUSA will notify owners, and dealers will replace the front seat belts, free of charge. The recall

NHTSA #21V05800005/02/2021Component: ELECTRICAL SYSTEM:SOFTWARE

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-C

Consequence

Failure of the eCall system may result in emergency responders being dispatched to the wrong locatio

Remedy

MBUSA will notify owners, and the communication module software will be updated by a dealer, or thro

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 #11033185

Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the instrument cluster. In addition, the following two conditions are also

TSB #11033050

Dear 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 for all dealer returns is no later than Thursday, June 11, 20

TSB #11033016

Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market vehicles. Cause Before deactivating the HERMES control unit (N112

TSB #11032875

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

TSB #11032736

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 for all dealer returns is no later than Thursday, June 4, 2026. After June 4th, returns of th

TSB #11032699

Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy

TSB #11031806

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 intake line assembly on your vehicle from the

TSB #11031729

The purpose of this letter is to advise you of additional benefits that Mercedes-Benz is providing to you regarding your vehicle ownership. Whats Included In our continuing efforts to assure the proper performance of Mercedes-Benz products

Showing the 8 most recent of 137 technical service bulletins on file with NHTSA.

20240206Component: STEERINGCrash reported2 injured

While driving on the freeway car pool lane with my wife, a sudden vibration in the front tires was observed, the car felt like it was pushed to the right then to the left even though it was in the cen

20180718Component: AIR BAGSCrash reported2 injured

I HIT A BEAR IN MONTANA IN MY 2017 MERCEDES C300 AT 86MPH AND DESTROYED THE FRONT OF MY CAR. THE SEATBELTS DEPLOYED AND WRENCHED US INTO OUR SEATS AND SMOKE CAME OUT OF THE FRONT AIR VENTS BUT THE AIR

20180718Component: STRUCTURE:BODYCrash reported2 injured

I HIT A BEAR IN MONTANA IN MY 2017 MERCEDES C300 AT 86MPH AND DESTROYED THE FRONT OF MY CAR. THE SEATBELTS DEPLOYED AND WRENCHED US INTO OUR SEATS AND SMOKE CAME OUT OF THE FRONT AIR VENTS BUT THE AIR

20180718Component: SEAT BELTSCrash reported2 injured

I HIT A BEAR IN MONTANA IN MY 2017 MERCEDES C300 AT 86MPH AND DESTROYED THE FRONT OF MY CAR. THE SEATBELTS DEPLOYED AND WRENCHED US INTO OUR SEATS AND SMOKE CAME OUT OF THE FRONT AIR VENTS BUT THE AIR

20240514Component: AIR BAGSCrash reported1 injured

The contact owns a 2017 Mercedes Benz C300. The contact stated that while making a left turn at 40 MPH, another vehicle crashed into the front passenger side of the vehicle. The air bags did not deplo

Showing the 5 most serious of 285 complaints filed with NHTSA.

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