51To keep your appliance in good working order, youhave to descale the side plate regularly, if no Britadescaling sytem WF 040-020 has been installed inthe water supply.Descale the oven when the descaling symbol nappears on the display.Leave the oven to cool down completely beforedescaling!Be careful not to scratch the oven interior whenremoving the side plate. Small parts might fall intothe base strainer. Tip: put a kitchen cloth over theoven base.Only use the descaler recommended by our after-sales service (order number 311 138). Otherdescalers may damage the appliance. Mix adescaling solution of 500 ml of water and 100 ml ofdescaler. Do not let the descaler come into contactwith the frame of the oven.Do not use any scouring or abrasive cleaningagents to clean the side plate.How to Proceed1 Pull out the left rack after undoing the knurlednut on the front side.2 Detach the grease filter in the upward direction.3 Undo the forward bolt with a socket spanner(13 mm). Depending on the version ofappliance, also undo the rear bolt with a socketspanner (13 mm). Remove the side plate anddescale it.4 If neccessary remove scale build-up inside theoven compartment with descaling solution.Rinse thoroughly any descaling solution withclear water.5 Re-insert the side plate. Re-attach the greasefilter and the racks.6 Check that all parts are fitted securely .7 Reset the descaling symbol in the basicsettings.Descaling175013.30