Mercedes Benz

2020 Mercedes Benz Truck ML 63 AMG Technical Service Bulletin # LI01-30_P-051567 Date: 110414 Page 48 Engine - MIL ON And Low Coolant Lamp ON Check engine light (CEL) on and low coolant indicator lamp lights up Topic number LI01.30-P-051567 Version 1 Design group 01.30 Cylinder head Date 04-14-2011 Validity M156 up to engine # 569xx 60 060658 Reason for change Complaint: CEL illumination, engine misfire, stalling, rough running low coolant indicator lights up. No external coolant loss detectable. Coolant in the engine oil and/or in the combustion chamber Cause: Cylinder head bolt broken. Engine coolant enters into engine oil. Coolant might be present in the combustion chamber. Affected engine number up to 1569xx 60 060658 Remedy: Remove cylinder heads. Measure piston deck height (specified value: 0.18 mm +/- 0.05 mm). If the measurement from the top surface of the cylinder crankcase to the top surface of the piston is outside of the specification (the maximum deck height i...