1998 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026
1998 · All trims · All engines
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Mercedes-Benz SLK/SLC has 3 documented known issues, with 1 rated critical. The most serious is R170 Tail Lamp Socket Thermal Deformation (NHTSA Recall 05V505) ($0-$450 repair). Across all issues with published estimates, repair costs range from $80 to $450. DIY maintenance guides at au7o.io.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Mercedes-Benz SLK/SLC has 3 documented issues. The most frequently reported are: R170 Tail Lamp Socket Thermal Deformation (NHTSA Recall 05V505), Central Locking PSE Vacuum Pump Failure (R170), Water Leaks into Trunk and Spare-Wheel Well from Blocked Drains / Boot Seals. Of these, 1 is rated critical and should be addressed promptly.
The 1998 Mercedes-Benz SLK/SLC has 3 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.
Repair costs for known Mercedes-Benz SLK/SLC issues range from $0 to $450, 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.
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.
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.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
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.
