Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Water Pump Replacement Instructions

Model: Mercedes Classe C W203 - Years: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Part: Pump

See other generations:
Video tutorial

Before proceeding with the water pump replacement, follow these recommendations: Note the routing diagram of the accessory belt around the various pulleys with a drawing or a photo, and use the new pump to trace its outline on a piece of cardboard. Punch holes where the pins will be inserted to maintain their relative position, as they have different lengths.

Next, begin disassembly by removing the plastic cover on the engine, draining the coolant through the drain plug under the radiator, and loosening the mounting bolts of the water pump pulley. Then, remove the accessory belt, take off the idler pulley located above the pump, and proceed to disassemble the pump itself, ensuring to place the pins on the template as previously indicated.

Finally, reverse the process to install the new pump.


Updated on 17 February 2026 by ScegliAuto


Related tutorials

How to Replace the Water Pump on a Mercedes-Benz C-Class?
How to Replace the Water Pump on a Mercedes-Benz C-Class?
Mercedes Classe C (2000-2007 / W203) To replace the water pump on a Mercedes-Benz C-Class, open the hood to access the components in the engine compartment. Locate the water pump pulley …
Water Pump Replacement Instructions
Water Pump Replacement Instructions
Mercedes Classe C (1983-1993 / ) It is recommended to perform this maintenance with the engine cold to avoid unpleasant burns. Start by draining the coolant through the drain plug lo…
Guide to replacing the water pump of the Mercedes Class C 1.8L
Guide to replacing the water pump of the Mercedes Class C 1.8L
Mercedes Classe C (2007-2013 / W204) The instructions in this guide will show us how to disassemble and replace the water pump of the Mercedes Class C, with a 1.8L engine code M271. To d…

Other guides you may be interested in

How to Replace the Starter Motor on an Opel Corsa?

In this tutorial, you will see how to replace the starter motor on an Opel Corsa C, a relatively simple task if you have good manual skills. First, open the bonnet, then disconnect the negative terminal of the battery to work safely. Next, locate the device at the rear of the engine, remove the intake manifold, and unscrew the two nuts from the power terminals. At this point, you can unscrew the mounting bolts of the starter motor, separate it from the engine, and install the replacement by following the reverse procedure.

Watch the video!


by ScegliAuto

More videos