My Megane R26 is due its second service now and Renault want to rape me for it, dry. The parts list is as follows :-

Oil & Filter
Air Filter
Pollen Filter

They want around £300 for this service. Obviously I'm in a good position to be able to get this service done (VAT registered specialist company) etc and plan to use genuine parts. Do I stand to lose my warranty?

I'm just reluctant to pay £300 for what will probably be a sub-standard service and the privaledge of having my pride and joy ragged to within an inch of its life by a workshop apprentice, when I am in a position to have this service carried out to a higher standard and for a considerably cheaper price.