Hi, I'm on my second S Type (first was a 4.0 V8 and now have an STR), both came with water leaking into the boot! I managed to fix the first one by lifing the seal off and applying silicone sealant (clear water resistant bathroom type from a DIY shop) to the metal panel joints (wait for it to go off before reapplying the seal), and also adjusting the closing bracket position downwards to make the boot seal tighter (it is in the centre under the plastic lower boot trim - just remove the trim, slacken off the two bolts and adjust before retightening). I tried this on my STR when I bought it about a month ago but found it still leaked (I also found that one of the rear light clusters was not secured properly - the pop in stud was not pushed home, so they are worth checking) - On further investigation I found that there was a 1/2 inch split in the seal which someone had tried to plug with some plumbers mate! I bought a new seal from the Jag dealer for £62 inc VAT and fitted it (only a 5 minute job) a couple of weeks ago and no problems since, hope this helps, John.
