The book says they recommend servicing every 18k or 2 yrs(A service), 36k or 4 yrs(B service) and 54k or 6 yrs (A service).
Both A & B Service comprise these common acions:
Check underneath body, wheel arches, openings
Visual inspection of exhaust
Visual examination of pads
Tightness of circuit
Check level of of brake fluid / hydraulic clutch
Check brake shoes and clean out dust including removal/refitting of drums (the book isn't just for Laguna)
Check Levels and circuit tightness
Front & Rear Windscree washer
Sequential Gearbox hydraulic unit (TWINGO)
Check the bearing play/condition of the rubber gaiters (B Service only)
Check condition and pressure of the tyres (including spare)
Visual inspection and titghtness of front & rearshock absorbers
Check bulbs (lights, indicators, brake lights
Check condition of vehicle battery charge
Condition of windscreen and rear-view mirrors
Condition of front & rear wiper blades.
Check the correct positioning of the safety and service labels
Road test (B service only)
That is the list given on page 10 of the service manual.
The Laguna V6 takes a spark-plug change at 72,000 miles and, an air filter change at 36,000 miles and a Passenger compartment filter at 18,000 miles.
72k or 5 yrs; except on 1.9dTi every 45k or 5 yrs and on 3.0d V6 diesel every 120k.
Accessories belt change:
72k miles or 5 yrs except on
1.9dTi every 45k or 5 yrs,
Trafic 1,9 dCi @54k,
3.0d V6 diesel @ 100k,
Clio 2.0 16v sport @36k or 5 yrs.
Fuel filters (petrol & Diesel)
90k for Laguna, Vel Satis, Twingo & Clio petrol engines,
72k for Avantime & Trafic petrol,
18k for Master & Traffic diesels,
The diesel filter must have any water drained from it if it is not replaced during the service.
DOT4 brake fluid (only): 72k or 4yrs (for vehicles with ESP, Renault recommends cold, low grade brake fluid (max 750mm sq./s @ -40 deg C) for best performance.
I hope that helps Chak.