maintenance reset Citroen DS5 HYBRID4 RHD 2013.5 1.G Owner's Manual

Service overdue
Every time the ignition is switched on, an overdue service is immediately signaled by flashing of the spanner and the fixed illumination of the Service warning lamp.
The distance remaining may be weighted by the time factor, depending on the driving conditions. Therefore, the spanner may also come on if you have exceeded the period since the last service, indicated in the maintenance and warranty guide .
Following this operation, if you wish to disconnect the battery, lock the vehicle and wait at least five minutes for the zero reset to be taken into account.
5 seconds after the ignition is switched on, the distance recorder resumes its normal operation. The spanner remains on .
Service indicator zero reset
After each service, the service indicator must be reset to zero. The procedure for resetting to zero is as follows:  switch off the ignition,  press and hold the trip distance recorder
zero reset button,  switch on the ignition; the distance recorder display begins a countdown,  when the display indicates "=0" , release the button; the spanner disappears.
Retrieving the service information
You can access the service information at any time.  Press the trip distance recorder zero reset button. The service information is displayed for a few seconds, then disappears.