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DRC adjustable suspension is genuinely debated

Audi RS4 (B7) · mechanical

The factory Dynamic Ride Control (DRC) hydraulic anti-roll system draws both criticism (leaking struts, eventual replacement, conversions to Bilstein/coilovers) and staunch defense (a healthy DRC is said to outperform expensive coilovers). Check for leaks and codes, and budget for service or a coilover conversion on higher-mileage cars.