Mercedes M Class ML250 BlueTec 4Matic Workshop Manual (2012-2015)

Description

Factory Mercedes M Class ML250 BlueTec 4Matic Workshop Manual (2012-2015)

This is the official factory-level service manual for the W166 Mercedes ML250 BlueTec 4Matic – the same technical resource referenced by Mercedes-Benz dealer technicians across the US. Whether you’re tackling AdBlue system maintenance or transmission diagnostics, every procedure is covered in full detail.

Powertrain & Drive Coverage

Component	Variants Covered
Petrol	N/A
Diesel	OM651 2.1L 4-cylinder turbodiesel BlueTec (204 hp)
Transmissions	7G-Tronic Plus 7-speed automatic
Drive	4Matic permanent all-wheel drive
Model Years	2012-2015
Badge Twins	Mercedes-Benz GLE 250d (W166, post-2015 rename)

Common ML250 Repairs Covered

System	Procedures
BlueTec / AdBlue (DEF)	NOx sensor replacement, AdBlue pump and injector service, SCR catalyst diagnostics
OM651 Timing Chain	Balance shaft module wear, timing chain tensioner replacement, camshaft phaser service
Air Suspension (AIRMATIC)	Compressor replacement, air strut leak repair, ride height sensor calibration
7G-Tronic Plus Transmission	Fluid and filter service, conductor plate (valve body) replacement, adaptation reset procedure

Format & Delivery

PDF. Instant download; lifetime re-downloads.

Frequently Asked Questions

Does this manual cover the AdBlue / BlueTec emissions system on the ML250?

Yes. The OM651-based ML250 uses Mercedes’ BlueTec SCR system with an AdBlue (DEF) injection circuit. This manual includes full diagnostic flow charts for NOx sensor faults, AdBlue pump and injector replacement, SCR catalyst testing, and fault code clearing – all procedures essential for US emissions compliance.

Is the W166 ML250 the same platform as the GLE?

Yes. The W166 M Class was rebranded as the GLE-Class for the 2016 model year. This manual covers the W166 generation built from 2012 through 2015, which carries the ML250 BlueTec designation in the US and most global markets.

Are wiring diagrams and electrical schematics included?

Full electrical documentation is included, covering engine management, 4Matic transfer case electronics, ABS/ESP circuits, COMAND infotainment, climate control, lighting, and body control modules – complete with connector pinouts, wire colors, and ground reference points.

What format is the manual?

This manual is a PDF file. After purchase, you receive an instant download link. The file is fully searchable, printable, and compatible with Windows, Mac, iOS, and Android devices using any standard PDF reader.