Description
Factory Mercedes GLA Class GLA220 4Matic Workshop Manual (2017–2020)
This is the official Mercedes-Benz factory-level workshop manual for the GLA220 4Matic, covering the complete X156 model range from 2017 through 2020 — the same resource referenced by authorized Mercedes dealerships across the US and worldwide.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | 2.0L M270 Turbocharged four-cylinder (~184 hp) |
| Diesel | N/A |
| Transmissions | 7G-DCT 7-speed dual-clutch automatic |
| Drive | 4Matic AWD |
| Model Years | 2017, 2018, 2019, 2020 |
| Badge Twins | N/A |
Common GLA220 4Matic Repairs Covered
| System | Procedures |
|---|---|
| M270 Timing Chain | Timing chain tensioner inspection and replacement — a known wear item on early M270 engines |
| 7G-DCT Transmission | Dual-clutch fluid service, mechatronic unit diagnosis, and shudder/hesitation fault procedures |
| 4Matic Transfer Case | AWD coupling unit service, transfer case fluid replacement, and driveshaft seal repairs |
| Electrical / COMAND | Wiring diagram tracing, ABS/ESP module diagnostics, and airbag system fault isolation |
Format & Delivery
Dealer software application compatible with Windows 11, 10, 8, 7, Vista, XP, Mac, and Linux. Instant download; lifetime re-downloads.
Frequently Asked Questions
Is the X156 pre-facelift and facelift GLA220 both covered?
Yes. The manual spans the full 2017–2020 production window for the X156 GLA220 4Matic, which includes both the pre-facelift configuration and the mid-cycle refresh variants. All trim levels sharing the M270 2.0L turbo engine and 4Matic drivetrain are included.
Does the M270 timing chain issue affect my 2017–2020 GLA220?
The M270 engine used in the GLA220 has a documented history of timing chain tensioner wear, particularly at higher mileages. This manual includes complete procedures for inspecting chain slack, replacing the tensioner, and verifying camshaft timing — giving you the factory specification data needed for a proper repair.
Are wiring diagrams and electrical schematics included?
Full electrical coverage is included: circuit diagrams for the engine management system, 4Matic AWD control modules, ABS/ESP, airbag circuits, COMAND infotainment, and body electrical systems. Each schematic details connector locations, pin assignments, wire colors, and ground point references.
What format is the manual?
This product is delivered as Mercedes-Benz dealer workshop software rather than a standalone PDF. It runs on Windows, Mac, and Linux and features menu-driven navigation, searchable content by engine code or gearbox code, zoom-capable illustrations, and integrated wiring diagrams. Download begins immediately after purchase.
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