2004 Mercedes-Benz SLK: common problems and reliability
An average SLK year.
7 owner complaints, most about exterior lighting. No recalls.
Should I buy a 2004 SLK?The 2004 Mercedes-Benz SLK has 7 owner-filed NHTSA complaints and 0 recalls on record. The most-reported areas are exterior lighting and electrical system. Owners most often flag engine timing chain/balance shaft issues (r171 m272 v6): timing chain noise, potential for catastrophic failure due to faulty balance shaft gears on 2004-2007 models.
Safety record for the 2004 model year
Source: NHTSA complaints and recalls filed for 2004 Mercedes-Benz SLK vehicles (US, public record).
The Year Score compares this year with other SLK years only. How we score it
Is 2004 a good year for the SLK?
Across the 13 SLK model years we track, complaint volume runs from 2 (2016) to 53 (2002). With 7 complaints, the 2004 SLK sits below the model's median of 12.
These are raw NHTSA complaint totals, not adjusted for how many cars sold or how long each model year has been on the road. Older and higher-selling years accumulate more complaints.
Where owners report problems
What owners say across generations
Sentiment is mixed and heavily dependent on generation, specific engine, and ownership expectations.
- RecurrentEngine timing chain/balance shaft issues (R171 M272 V6)
Timing chain noise, potential for catastrophic failure due to faulty balance shaft gears on 2004-2007 models.
Owner insights cover all generations of the SLK. See the full SLK owner picture and every model year.
Typical used price
Used SLK listings typically run $13,038–$19,230 across 2000 to 2016 model years.
Other SLK model years
Compare every SLK year side by side to see how 2004 ranks against the rest.
Compare the SLK against its rivals
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