1999 Mercedes SLK 230 Won't Start with P1747, P0466, and P0433 Error Codes - Troubleshooting Guide

Model: 99 slk 230 Mercedes Fault Code: P0433 Posted: 2019-12-26 15:19

Hi everyone, I'm having trouble starting my 1999 Mercedes SLK 230. The car won't start and displays three diagnostic error codes: P1747, P0466, and P0430. I've already replaced two sensors — the cam position sensor located at the back of the engine and the timing chain sensor at the front — but the issue persists. The car only runs when gas is manually supplied to the fuel rail, which indicates a potential problem with the fuel system or related sensors. Despite these replacements, the codes remain active. I'm looking for help diagnosing the root cause of these errors and how to resolve them effectively. Any insights on P1747 (Fuel Rail Pressure Sensor Circuit), P0466 (Exhaust Gas Recirculation Valve - EGR - Malfunction), or P0433 (O2 Sensor Heater Circuit) in a 1999 SLK 230 would be greatly appreciated.