In this video, I replace the full set of front engine components on a Mercedes E220 CDI W211/S211 (OM646 engine), including the water pump, thermostat, coolant, belt tensioner, and pulleys.

This is a complete step-by-step tutorial covering everything needed to service the cooling system and accessory drive system on your W211, ideal for DIY mechanics and Mercedes owners wanting to keep their E-Class running smoothly and reliably.

🔧 In this video you’ll see:

Water pump removal & installation

Thermostat replacement

Complete coolant flush & refill

Belt tensioner replacement

Idler pulleys & serpentine belt installation

Tips for avoiding common W211 cooling system problems

Torque specs and correct coolant type

Bleeding the cooling system properly

🛠 Suitable for:

Mercedes W211 E220 CDI

Mercedes S211 E220 CDI (estate)

OM646 diesel engine

Other E-Class models with similar cooling layouts

Parts used:

Water Pump:
Febi 24205 (OE reference A6462000301)

Thermostat:
Febi 102115 (OE reference A6462000015)

Belt Tensioner:
Febi 26775 (OE reference A6462000570)

Idler Pulleys (Guide Pulley):
Febi 11276 (OE reference A0002020919)

Coolant:
Febi 172003 (MB 325.0 / 325.3 specification) 10 litres ready mix

Auxiliary Belt:
Febi 28996 (OE reference A0029938996)

This job helps prevent overheating, coolant leaks, belt squeal, bearing noise, and breakdowns — essential maintenance on a high-mileage W211.

📺 More Mercedes W211 Videos:
https://youtu.be/F_wNnh36yFQ
Full Service: Oil + All Filters → https://youtu.be/F_wNnh36yFQ

More coming soon!

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#mercedes #w211 #s211 #mercedeseclass #e220cdi #mercedesdiy #carrepair #autorepair #coolingsystems #om646 #carmaintenance

Hochgeladen am 05.12.2025   Problem melden   Dieses Video bei YouTube   The Keen Mechanic bei Youtube