Sheer Performance | How to Replace Mercedes M278 M157 Turbocharger Coolant Lines the Easy Way

This video is an in-depth step-by-step tutorial on how to replace the turbocharger coolant lines on a Mercedes-Benz M278 or M157 4.7L/5.5L bi-turbo V8 engine, notably without having to remove the driver-side fitting bolt that is on the turbo, which is notoriously difficult to access. Mercedes M278 and M157 engines found in E550 / S550 / CL550 / CLS550 / SL550 / ML550 / GL550 / G550 and E63 / S63 / CL63 / CLS63 / SL63 / G63 AMG cars are notorious for having plastic turbo charger coolant lines that crack with age and are difficult to replace by conventional means due to lack of access on the driver-side turbo fitting. ------------------ 0:00 Intro 0:36 Which Style of Coolant Fittings Do I Have? 2:36 Disassembly to Access Turbo Coolant Lines 9:19 Cutting Away Old Plastic Lines 11:04 Dealing with Fittings That Snap Off Inside Water Pump 18:55 Making New Line Sets 20:52 Installing New Line Sets 24:06 Torque Values Chart + Reassembly ___________ If Purchasing My Billet Fittings: https://www.sheer.design/store/p/bill... 5/16" ID Heater Hose (If Modifying OEM Fittings): https://a.co/d/1YTUKzf OEM Line Set Part Numbers: IMPORTANT: This list may be non-exhaustive, Sheer Performance is not responsible for incorrect part purchases. Verify correct P/N with your vehicle before purchasing. Correct parts can be identified visually by the shape of the fittings and cooling system layout in most cases. Left (Driver) Return: 2782001100 Left (Driver) Return w/ Cover Block: 2782001300 Left (Driver) Feed: 2782000900 Right (Passenger) Return: 2782000851 Center Return Diverter: 2782001400