Description
Factory Mercedes CLS450 4Matic Workshop Manual (2018–2022)
This is the same dealer-grade diagnostic and repair software used by Mercedes-Benz authorized service centers across the US — covering every C257-platform CLS450 4Matic built from model year 2018 through 2022.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol / Mild Hybrid | 3.0L M256 E30 inline-six turbo with EQ Boost ISG (48V mild-hybrid), 362 hp |
| Diesel | N/A |
| Transmissions | 9G-TRONIC 9-speed automatic |
| Drive | 4Matic full-time AWD |
| Model Years | 2018, 2019, 2020, 2021, 2022 |
| Badge Twins | N/A — C257 chassis exclusive to CLS-Class |
Common CLS450 Repairs Covered
| System | Procedures |
|---|---|
| 48V EQ Boost / ISG | Integrated starter-generator diagnosis, belt tensioner replacement, 48V battery service |
| Engine Oil Leaks (M256) | Camshaft adjuster solenoid seal replacement, valve cover gasket R&R |
| Air Suspension (AIRMATIC) | Compressor replacement, strut replacement, ride-height sensor calibration |
| 9G-TRONIC Transmission | Fluid and filter service, valve body diagnostics, shift adaptation reset |
Format & Delivery
Dealer software (compatible with Windows 11, 10, 8, 7, Vista, XP, Mac, and Linux). Instant download; lifetime re-downloads.
Frequently Asked Questions
Is the M256 EQ Boost mild-hybrid system fully covered, including the 48V components?
Yes. The software includes complete service procedures for the M256’s integrated starter-generator, the 48V lithium-ion auxiliary battery, the DC/DC converter, and associated wiring. Fault code diagnostics, component replacement steps, and torque specs for all mild-hybrid hardware are included.
Does this cover both left-hand and right-hand drive C257 CLS450 variants?
Yes. The C257 CLS450 4Matic was produced in both LHD and RHD configurations for global markets, and this software documents both variants — including steering system, pedal box, and airbag differences between the two layouts.
Are AIRMATIC air suspension repair procedures included?
Absolutely. The suspension section covers the full AIRMATIC system fitted to US-spec CLS450 models, including compressor overhaul, front and rear air strut replacement, pressure sensor diagnosis, and ride-height calibration sequences required after component replacement.
What format is the manual?
This product is Mercedes-Benz dealer software — not a PDF. It installs on Windows, Mac, or Linux and provides menu-driven access to wiring diagrams, EPC parts data, technical diagnostics, and full repair procedures with searchable content by engine code, gearbox code, and model year.
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