Mercedes-Benz SLK/SLC Problems: 3 Issues Every Owner Should Know
2005-2020 model years · 3,070+ owner reports · Updated April 2026
According to Au7o's analysis of 3,070+ owner reports, the 2005-2020 Mercedes-Benz SLK/SLC has 3 documented known issues, with 2 rated critical. The most serious are M271 Timing Chain Stretch and Tensioner Failure ($1,500-$3,500 repair) and M272 Balance Shaft Sprocket Wear and Failure ($2,000-$5,000 repair). The most commonly reported issue is M271 Timing Chain Stretch and Tensioner Failure with 1,200 owner reports. Across all issues, repair costs range from $500 to $5,000. DIY maintenance guides at au7o.io.