Description
Factory Mercedes CLS Class C257 Workshop Manual (2018–2022)
This is the official factory-level workshop manual for the third-generation Mercedes-Benz CLS Class (chassis code C257), covering every production year from 2018 through 2022 — the same resource relied upon by authorized Mercedes dealers across the US.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Gasoline | M264 2.0L inline-four (CLS 350), M256 3.0L inline-six EQ Boost mild-hybrid (CLS 450, AMG CLS 53 — 435 hp) |
| Diesel | OM654 2.0L inline-four (CLS 220d, CLS 300d), OM656 3.0L inline-six (CLS 400d) |
| Transmissions | 9G-TRONIC 9-speed automatic |
| Drive | RWD; 4MATIC AWD |
| Model Years | 2018–2022 |
| Badge Twins | N/A |
Common CLS Class C257 Repairs Covered
| System | Procedures |
|---|---|
| 48V EQ Boost Mild-Hybrid | Integrated starter-generator (ISG) diagnostics, belt-driven alternator replacement, 48V battery service on M256 engines |
| 9G-TRONIC Transmission | Valve body service, fluid and filter replacement, TCU adaptation reset, shift quality fault diagnosis |
| Air Suspension (AIRMATIC) | Compressor replacement, air strut seal inspection, ride-height sensor calibration, leak detection procedures |
| LED Multibeam Headlights | Control module replacement, adaptive leveling calibration, individual LED segment fault isolation, wiring harness pinout verification |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Which CLS C257 variants does this manual cover?
The manual covers all C257 production models including the CLS 220d, CLS 300d, CLS 350, CLS 400d, CLS 450, and the Mercedes-AMG CLS 53. Both standard RWD and 4MATIC all-wheel drive configurations are fully documented, along with all trim levels sold in the US and global markets between 2018 and 2022.
Does this manual cover the AMG CLS 53 specifically?
Yes. The AMG CLS 53 is built on the same C257 platform and uses the M256 3.0L inline-six with EQ Boost mild-hybrid technology tuned to 435 hp. This manual includes AMG-specific engine management data, performance exhaust procedures, AMG RIDE CONTROL suspension details, and unique TCU calibration information for the 53 variant.
Are wiring diagrams and ADAS system schematics included?
Yes. The electrical section provides full wiring diagrams for the MBUX infotainment system, advanced driver assistance systems (Active Distance Assist DISTRONIC, Active Lane Keeping), LED Multibeam headlight control, CAN bus network topology, connector pinouts, and ground point locations — everything needed for systematic electrical fault-finding on the C257.
What format is the manual?
This manual is delivered as a fully searchable PDF. After purchase you receive an instant download link, and the file can be opened on any Windows or Mac computer, tablet, or smartphone using any standard PDF reader. Individual pages or complete sections can be printed for workshop use, and your download remains available for life.
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