Do not confuse the EGR and Throttle body. The EGR is the big unit with the right hand hose connecting to the top of the intercooler and the left side hose going into the inlet manifold. The butterfly valve you can see if you take the pipes off and look through the hole, is the Throttle valve and not the EGR as some think. There's a video on you tube titled 'Cleaning the EGR on a Euro IV D5, however the guy's actually cleaning the throttle valve (bolted to the right hand side of the EGR unit,) The EGR is not a Butterfly Design on the Euro IV and cannot really be viewed, but if you look through the EGR, you will see an opening on the bulkhead side of the Throttle valve, that's where the EGR gases enter from the EGR Cooler. If you stand at the from of the car and look at the EGR, to the right and below it, Is an oval black plastic cover with metal clips on the side. Underneath this is the connector plug for the Throttle.
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