What are the most common Mercedes-Benz SLK/SLC problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2004 Mercedes-Benz SLK/SLC has 4 documented issues. The most frequently reported are: R170 Tail Lamp Socket Thermal Deformation (NHTSA Recall 05V505), M271 Camshaft Adjuster (VVT) Magnet Solenoid Failure and Oil Intrusion, Central Locking PSE Vacuum Pump Failure (R170). Of these, 1 is rated critical and should be addressed promptly.
Is the Mercedes-Benz SLK/SLC reliable?
The 2004 Mercedes-Benz SLK/SLC has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: R170 Tail Lamp Socket Thermal Deformation (NHTSA Recall 05V505). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz SLK/SLC problems?
Repair costs for known Mercedes-Benz SLK/SLC issues range from $0 to $550, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, R170 Tail Lamp Socket Thermal Deformation (NHTSA Recall 05V505), typically costs $0-$450 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 1998-2004 Mercedes-Benz SLK/SLC R170 Tail Lamp Socket Thermal Deformation (NHTSA Recall 05V505)?
On first-generation R170 SLKs, heat generated by the brake bulbs causes the base of the tail-lamp bulb sockets to deform over time, loosening the socket-to-bulb electrical contact and potentially causing the brake and tail bulbs to stop illuminating - a rear-end collision risk. M… Repairs typically run $0-$450. Severity: high.
What is the 2004-2015 Mercedes-Benz SLK/SLC M271 Camshaft Adjuster (VVT) Magnet Solenoid Failure and Oil Intrusion?
The M271 four-cylinder's camshaft adjuster magnets (variable valve timing solenoids) commonly fail or become oil-fouled on R171 SLK200 Kompressor and R172 SLK250 models. A well-documented M271 defect is engine oil wicking up the solenoid connector into the wiring harness toward t… Repairs typically run $120-$550. Severity: medium.
What is the 1998-2004 Mercedes-Benz SLK/SLC Central Locking PSE Vacuum Pump Failure (R170)?
The pneumatic system equipment (PSE) vacuum pump that operates the central locking is repeatedly described by R170 owners as the single most failure-prone part on the car. It is mounted in the trunk and also controls the alarm, rear demister and interior light. Water ingress into… Repairs typically run $80-$400. Severity: medium.
What is the 1998-2011 Mercedes-Benz SLK/SLC Water Leaks into Trunk and Spare-Wheel Well from Blocked Drains / Boot Seals?
SLKs (R170 and R171) frequently suffer water intrusion into the trunk and spare-wheel well. The usual culprits are clogged roof/rear-window drain tubes (which fill with leaf mulch and moss), a blocked drain under the spare well, and perished or misaligned boot seals - especially… Repairs typically run $0-$350. Severity: medium.
