I think that the answer must be no for two reasons,
you would cook your clutch with any hill start,
your car is not rated to tow this weight so to do so is illegal and in the event of an accident your insurers would decline to pay and the police would possibly take a dim view of the situation,
In the back of your Renault owners manual you will find the safe maxium load for your car. you must also include the trailer ie.2 T + WEIGHT OF TRAILER= LOAD.
Not many cars will tow that weight legally on public roads. The trailer will probably weigh 500-800kg, making the total near 3tonnes. You are looking at...
Land Rover (not Freelander)
Range Rover
Land Cruiser
Patrol
You need to check your license as well, because if it is recent you may not have the entitlement to tow a trailer this weight. It has all become very complicated unfortunately.
<hr width=100% size=1>One day, I want to be a real sailor. In the mean time I'll just keep tri-ing.
NO, it might move it, but to tow legally on the road you must not exceed the total gross mass weight, that you will find on the VIN plate under the bonnet.
your handbook will tell you but I would expect the Laguna Estate to be between 1350kg and 1500kg, with trailer a two ton boat probably has a towing weight around 2450kg You will need a 4 wheel drive to be able to tow legally.
In general, my views are that you want the car to be heavier than the tow (caravan club recommends 85%) for safety reasons, and a gross train weight of 3.5tons limits you to about 1.7tons for the trailer.
dealing with the 'will it' - yes. It won't stop it in less than a mile on the flat but it will get it going.
I towed my previous boat with a 2 litre Espace; that was a twin axle trailer at 325kg and a boat at 1600kg. I would not recommend it - and that was with good brakes on 4 wheels!
Now the Landcruiser is a different proposition entirely, and Range Rovers seem to be even better.
others have commented on (some of) the legal niceties - on more than one occasion I have been advised by traffic police that in their view everyone is breaking some law now simply because of the complexities that have been introduced.
In my view the 85% guide is outdated and the manufacturer's figures are the one to use.
I agree with everyone else. Look on the VIN plate under the bonnet. There will be 4 weights stamped on it. The first is the maximum (fully loaded) permitted weight of the car. The second is the Gross train weight (maximum permitted weight of car + trailer) the other two are maximum permitted axle weights. To be honest, if the boat weighs 2 tons, you really would need a biggish 4WD to be safe (and legal).