exhaust-gas turbocharger the housing of the charger is cut in a way you can see compression wheel, turbine wheel and bearings the two sides are marked by colours: compression side – blue, turbine side – red all parts can be easily moved description ordernumber 1004 see also: Mercedes-Benz A Class petrol engine with injection Mercedes-Benz camshaft adjustment swivel-vane vacuum pump for diesel engine cylinder head four-valve mechanism