2017 Mercedes-Benz CLA250 Service and Repair Manual

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2017 Mercedes-Benz CLA250 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
  • Sport Sedan 4-Door

Engines covered

  • 2.0L 1991CC l4 GAS DOHC Turbocharged
  • 2.0L 1991CC l4 FLEX 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 #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 #19V89200016/12/2019Component: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2015-2018 CLA250 and CLA250 4MATIC, and 2017-2018 CLA45 AMG vehicles. The Occupant Classification System (OCS) may have been improperly calibrated

Consequence

In the event of a crash, if the air bag does not deploy as designed, the front seat passenger has an

Remedy

MBUSA will notify owners, and dealers will replace the passenger seat cushion, free of charge. The

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 #17V08000008/02/2017Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 CLA250, CLA250 4Matic, E400 Coupe, E400 4Matic Coupe, E550 Coupe, E400 Cabriolet, E550 Cabriolet, E300, E300 4Matic, E400 Wagon, GLA250, and GL

Consequence

If the pelvis airbag or the front passenger airbag does not deploy as intended in the event of a cra

Remedy

MBUSA will notify owners, and dealers will replace the affected air bag modules, free of charge. Th

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 #21V22900001/04/2021Component: STEERING

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 B250e, CLA250, 2017-2018 AMG CLA45, GLA250, and AMG GLA45 vehicles. The steering shaft bore hole for the universal joint bearing may allow exc

Consequence

A separated universal joint bearing can cause a loss of steering control and increase the risk of a

Remedy

MBUSA will notify owners, and dealers will inspect, and as necessary, replace the steering shaft, fr

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 #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 #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 #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

TSB #11031616

Daimler AG (DAG), the manufacturer of Mercedes-Benz vehicles, has determined that on the various Model Year (MY) 2014 - 2018 Mercedes-Benz vehicles listed below, the engine control unit (ECU) software may not meet current specifications. In

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 #11030088

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 #11029093

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

Showing the 8 most recent of 83 technical service bulletins on file with NHTSA.

20200529Component: AIR BAGSCrash reported1 injured

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. THE CONTACT STATED WHILE DRIVING AT AN UNKNOWN SPEED, A VEHICLE UNEXPECTEDLY MADE A LEFT TURN INTO THE FRONT DRIVERS SIDE OF HER VEHICLE CAUSING IT TO A

20210628Component: STRUCTURE:BODYCrash reported

The Panoramic Sunroof Glass front cover has detached three times from my 2017 CLA 250 (VIN#[XXX]). The first time that it detached was with the previous owner and was repaired at a Mercedes dealershi

20230202Component: AIR BAGS1 injured

The airbag spontaneously deployed while driving. No impact with any other vehicle and no previous damage.

20250724Component: ELECTRICAL SYSTEM

What component or system failed or malfunctioned, and is it available for inspection upon request? The instrument cluster display intermittently failed, either showing incorrect information or going

20250616Component: POWER TRAIN

Component or System That Failed or Malfunctioned: The component that failed was the partial-load ventilation valve, which is part of the engine’s crankcase ventilation system. This valve is responsi

Showing the 5 most serious of 37 complaints filed with NHTSA.

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