Suryaputra,
actually I checked on this with Maruti and, believe it or no, even Jaguar (a friend is in Jaguar). Thing is, the manufacturer doesnt usually put in full synthetic. Thats because there are all types of users- some who use daily and some who use once in a while, some with a heavy foot and some sedate drivers etc. They use semi-synthetic, just a better quality.
In semi-synthetic, there ar not too many options. IOCL Servo is mostly the only one.
P is prewarn and F os full blast. So if you set a prewarn sensitivity, once the car is discturbed beyond that value, it will sound alarm for 15 seconds and then shut up
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. With F, once the alarm is sounded, it will ring till you unlock the car. Since you want the car to sound if people lean on it and such, set P to 10. You must get a "successful" prompt, its very easy to mistake the "unsuccessful" for it. Also, it wont alarm if you try to push the car or pull the handle with the key in pocket. Thats so that the alarm doesnt go off as a nuisance if you pull the handle without unlocking. It works though. Any someone can still gently lean against the car without setting off the alarm. At a setting of 10, it goes off only if you lean hard and continuously
Ameyam