Service and repair manuals for 6 model years of the Mercedes-Benz 420SEL, 1986 to 1991. Each manual is matched to one exact year — the specifications and procedure sequences are the ones Mercedes-Benz published for that year's engine and trim, not values carried across the whole production run.
Engines across the range: 4.2L V8 — 256 cu in, SOHC.
01 / Model yearsChoose your 420SEL year
| Year | Price | Recalls | Engines | Trims | |
|---|---|---|---|---|---|
| 1991 | $40.99 | — | 4.2L V8 | Base Sedan 4-Door | select |
| 1990 | $40.99 | — | 4.2L V8 | Base Sedan 4-Door | select |
| 1989 | $40.99 | — | 4.2L V8 | Base Sedan 4-Door | select |
| 1988 | $40.99 | — | 4.2L V8 | Base Sedan 4-Door | select |
| 1987 | $40.99 | — | 4.2L V8 | Base Sedan 4-Door | select |
| 1986 | $40.99 | — | 4.2L V8 | Base Sedan 4-Door | select |
02 / InsideSample pages
From the 1991 420SEL manual.
03 / ContentsWhat the manual covers
- Quick Lookups 65
- General Information 1,614
- Accessories & Equipment 150
- Heating, Ventilation & A/C (HVAC) 280
- Body & Frame 50
- Maintenance 130
- Brakes 113
- Restraints 78
- Drivelines & Axles 60
- Steering 90
- Electrical 115
- Suspension 30
- Engine Mechanical 143
- Transmission 95
- Engine Performance 341
04 / Other yearsOther 420SEL years
1991 Mercedes-Benz 420SEL · $40.99 select →
Engines: 4.2L V8 — 256 cu in, SOHC. Trims: Base Sedan 4-Door.
No recalls on federal record for the 1991 420SEL.
1990 Mercedes-Benz 420SEL · $40.99 select →
Engines: 4.2L V8 — 256 cu in, SOHC. Trims: Base Sedan 4-Door.
No recalls on federal record for the 1990 420SEL.
1989 Mercedes-Benz 420SEL · $40.99 select →
Engines: 4.2L V8 — 256 cu in, SOHC. Trims: Base Sedan 4-Door.
No recalls on federal record for the 1989 420SEL.
1988 Mercedes-Benz 420SEL · $40.99 select →
Engines: 4.2L V8 — 256 cu in, SOHC. Trims: Base Sedan 4-Door.
No recalls on federal record for the 1988 420SEL.
1987 Mercedes-Benz 420SEL · $40.99 select →
Engines: 4.2L V8 — 256 cu in, SOHC. Trims: Base Sedan 4-Door.
No recalls on federal record for the 1987 420SEL.
1986 Mercedes-Benz 420SEL · $40.99 select →
Engines: 4.2L V8 — 256 cu in, SOHC. Trims: Base Sedan 4-Door.
No recalls on federal record for the 1986 420SEL.
05 / OwnershipOwn it — don't rent it
| Option | What you pay | After a year |
|---|---|---|
| eManualStore 420SEL manual | $40.99 once | Still yours |
| Per-vehicle online subscription | from $29 / year, renewing | Pay again or lose access |
| Library membership services | $33 / month, capped | $396 spent, nothing kept |
| Professional shop databases | $499–$2,388 / year | Renew or lose access |
Competitor figures as published on their sites, August 2026.
FAQQuestions about the 420SEL manual
Which 420SEL years does this manual cover?
Every year from 1986 to 1991 — 6 separate manuals, one per model year. Pick your year in the selector; the manual you receive is matched to that exact year, engine and trim.
Is this the OEM Mercedes-Benz 420SEL manual or an aftermarket guide?
The OEM version. It carries the procedures, specifications, torque values and wiring diagrams Mercedes-Benz published for the 420SEL, organized by system — not a condensed aftermarket summary.
Does it include 420SEL wiring diagrams?
Yes. Full wiring diagrams are part of every 420SEL manual, alongside repair procedures, specifications and diagnostic information.
Why do some 420SEL years cost more?
Every 420SEL year is $40.99.
Is this a subscription?
No. One payment, and the manual is yours to keep — unlike per-vehicle subscriptions that renew every year.
How do I get the manual after purchase?
It is a digital manual — nothing ships. Access details arrive by email right after checkout, and you can use it on any device.
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