The service and repair manual for the 2020 Mercedes-Benz GLS450 — the 3.0L I6 engine, 1 trim. Matched to this exact model year, so the specifications and sequences are the ones Mercedes-Benz published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2020 |
|---|---|
| Engines | 3.0L I6 — 183 cu in, DOHC, turbocharged |
| Trims | 4Matic Sport Utility 4-Door |
| Federal record | 2 recalls · 1 complaints · 0 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2020 GLS450 manual
03 / ContentsSections in the manual
- Quick Lookups 55
- Engine Performance 1,198
- Accessories & Equipment 5,059
- General Information 2,126
- Body & Frame 1,609
- Heating, Ventilation & A/C (HVAC) 352
- Brakes 567
- Hybrid/Electric Powertrain 42
- Collision 485
- Restraints 984
- Drivelines & Axles 475
- Steering 276
- Electrical 2,867
- Suspension 680
- Engine Mechanical 1,678
- Transmission 446
- Common Specs & Procedures - 167
04 / Known issuesRecalls on federal record for the 2020 GLS450
- Electrical System — instrument cluster/panel · 20V089000If the interior switches are not illuminated, they may be more difficult to find and operate, increa.
- Structure — body › door › hinge and attachments · 19V709000The detached trim can become a road hazard, increasing the risk of a crash.
Owners have filed 1 complaints and Mercedes-Benz has issued 0 technical service bulletins for the 2020 GLS450. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2020 GLS450 manual
Is this manual specific to the 2020 GLS450?
Yes. It is the OEM manual matched to the 2020 model year, covering the 3.0L I6 across the 4Matic Sport Utility 4-Door trims. Specifications and procedure sequences are the ones Mercedes-Benz published for this year.
What 2020 GLS450 problems does it help with?
2 recalls are on federal record for the 2020 GLS450, covering electrical system, structure. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Mercedes-Benz dealers.
Does it include 2020 GLS450 wiring diagrams?
Yes — the complete wiring diagrams for the 2020 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $40.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther GLS450 years and 2020 Mercedes-Benz models
2019 GLS450 · 2018 GLS450 · 2017 GLS450 · all 4 years
2020 Mercedes-Benz A200 · 2020 Mercedes-Benz A220 · 2020 Mercedes-Benz A250 · 2020 Mercedes-Benz A35 AMG · 2020 Mercedes-Benz A45 AMG S · 2020 Mercedes-Benz AMG GT · 2020 Mercedes-Benz AMG GT 53 · 2020 Mercedes-Benz AMG GT 63 · 2020 Mercedes-Benz AMG GT 63 S · 2020 Mercedes-Benz AMG GT C · 2020 Mercedes-Benz AMG GT R · 2020 Mercedes-Benz AMG GT R Pro · every 2020 model