open bootlid (trunk) remove boot rubber and inside plastic panel on the body not bootlid there should be fasteners then trace fasteners at both fender linings and remove all fasteners under the bumper next gently pull both sides of the bumper away from the fender it only moves about 10-20mm then slide bumper off the vehicle remember as the bumper comes off you still need to disconnect number plate light and parking distance sensors if your vehicle has also if it has disconnect reverse camera
Not sure with the French cars but most manufactures steal from each other, there must be a relearn or a sequence you have to follow before the computer recognizes the new battery.
Check if TA (Traffic Announce) function is turned on - sometimes radio station is using that feature improperly, thus causing volume to go up by itself.
if it is a manual(not stated ) then the problems as indicated is a clutch not disengaging when depressed
possible causes are
no oil in the system
air in the system
failed clutch master cylinder and /or clutch salve cylinder
If cable clutch then it may be a broken cable.
Well like you say ( lamba) means o2 sensor and cat .... New ? Co2 too much gas it could be bad fuel injectors ..... Check for codes the ecm have the most important info about it
