Description
Factory Mercedes SLK320 Workshop Manual (1998–2004)
This is the official factory-level repair manual for the first-generation Mercedes-Benz SLK320, covering every R170 roadster sold in the US market from 1998 through 2004. Written to Mercedes-approved garage standards, it delivers the depth of coverage independent technicians and dedicated owners need to service, diagnose, and restore these compact roadsters.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | 3.2L M112 V6 |
| Diesel | N/A |
| Transmissions | 5-speed manual, 6-speed manual, 5-speed automatic |
| Drive | RWD |
| Model Years | 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
| Badge Twins | N/A |
Common SLK320 Repairs Covered
| System | Procedures |
|---|---|
| Vario-Roof Hydraulics | Retractable hardtop hydraulic cylinder inspection, fluid replacement, and latch mechanism adjustment |
| M112 Engine | Front crankshaft seal replacement, spark plug service, and intake manifold gasket inspection |
| Transmission | 5-speed automatic valve body service, fluid and filter change, shift quality diagnostics |
| Brake System | Front and rear caliper overhaul, rotor resurfacing, ABS sensor replacement, and brake fluid flush |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Why does the Vario-Roof on my R170 SLK320 operate slowly or fail to latch?
This is among the most reported issues on the R170 SLK. The retractable hardtop relies on a hydraulic pump and a set of cylinders that degrade over time. The manual covers the complete hydraulic circuit — pump removal, cylinder seal replacement, fluid specification, and latch alignment procedures — so you can restore smooth roof operation without dealer labor rates.
Does this manual cover the R170 platform across all SLK models, or only the SLK320?
This specific manual is focused on the SLK320 variant fitted with the 3.2L M112 V6 engine. The R170 platform also underpinned the SLK230 and SLK32 AMG, but those models use different powertrains and have their own dedicated manuals. All SLK320 chassis configurations — left- and right-hand drive — are fully covered here.
Are full wiring diagrams included for the M112 engine management and SRS airbag systems?
Yes. The electrical section includes circuit diagrams for the M112 engine control unit, ABS/ASR, SRS supplemental restraint system, climate control, Vario-Roof electronics, lighting, and all body electrical circuits — complete with connector pinouts and ground locations useful for US-market fault diagnosis.
What format is the manual?
The manual is delivered as a PDF download, compatible with Windows, Mac, Linux, Android, and iOS. Text is fully searchable, illustrations support zoom, and the file can be stored locally for workshop or roadside use without an internet connection.





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