Description
Factory Mercedes GLS450 4Matic Workshop Manual (2019-2022)
This factory-level service manual covers the X167-platform GLS450 4Matic in full — the same reference material used by Mercedes-Benz dealer technicians across North America for diagnosis, repair, and scheduled maintenance.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | M256 3.0L inline-6 turbocharged with EQ Boost integrated starter-generator (362 hp / 369 lb-ft) |
| Diesel | N/A |
| Transmissions | 9G-TRONIC 9-speed automatic |
| Drive | 4Matic full-time AWD with transfer case and front/rear differentials |
| Model Years | 2019, 2020, 2021, 2022 |
| Badge Twins | N/A |
Common GLS450 Repairs Covered
| System | Procedures |
|---|---|
| Airmatic Air Suspension | Compressor replacement, air strut R&R, level sensor calibration — a frequently reported issue on X167 models |
| M256 Engine / EQ Boost | Integrated starter-generator belt service, timing chain inspection, turbocharger oil feed line replacement |
| 9G-TRONIC Transmission | Fluid and filter service, valve body diagnostics, torque converter removal |
| Electrical / MBUX | CAN bus fault diagnosis, ADAS module replacement, wiring harness connector identification and repair |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Is the X167 air suspension system fully documented in this manual?
Yes. The Airmatic air suspension section covers the full X167 system, including compressor diagnostics, individual strut replacement torque specs, ride-height sensor calibration procedures, and fault code isolation — essential given that air suspension faults are among the most commonly reported issues on 2019-2022 GLS-Class vehicles.
Does this manual cover the EQ Boost mild-hybrid components on the M256 engine?
It does. The M256 section addresses the 48-volt EQ Boost integrated starter-generator, including belt routing, tension specifications, and replacement procedures alongside conventional engine topics like turbocharger service, fuel injection diagnostics, and timing chain inspection intervals.
Are wiring diagrams and MBUX electrical schematics included?
Full electrical coverage is provided, including MBUX infotainment schematics, ADAS wiring, lighting circuits, air suspension control modules, and CAN bus network layouts with connector pin assignments and wire color coding throughout.
What format is the manual?
The manual is a PDF file delivered via instant download upon purchase. It is fully searchable, compatible with all major operating systems and devices, and requires only a standard PDF reader. There is no expiration, and you may re-download at any time.
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