My experience of UK Bosch power tools after sales service is very poor. I returned a cordless 10.8v professional (blue) screwdriver to their service centre for repair under the guarantee as the unit stopped working within the 12 months period. I sent a copy of my purchase receipt along with an explanation of the fault. I was then sent an invoice for the repair which totalled more than the actual cost of the tool new. When I quizzed this charge I was told that the screwdriver had broke through wear and tear and this was not covered. So what is wear and tear? Well it's using the item so how do you define what is a wear an tear part on a professional tool? Well mine was the brushes worn out, yes on a professional version cordless power tool within 12 months and they are not even replaceable as its a new complete motor. They point blank refused to repair it free of charge even though I had only used it as a normal cordless tool in the trade they sell it to, so beware buying Bosch, their tools run well until they break but the guarantee is useless if its an expensive part that breaks then it will most probably be a wear and tear part and their customer service is so poor. As for the extended warranty for 3 years, well come on, if they won't change parts within 12 months I don't think you stand a chance in the extra years.
Just as another note, I own a dewalt (yellow)cordless drill which has been used heavily throughout the years and although its very rugged it has failed a few times but whenever it was returned it was repaired hassle free and even guaranteed any parts fitted further under warranty, there is no comparison to quality and after sales service.
Bosch "blue" power tools are for the trade. Similar in design to some of the green DIY tools, but inside are better components for daily use rather than occasional. Hard wearing. Its good gear right enough, but when things do break down they really excel. The blue stuff has a year guarantee that if you register your product within 4 weeks of purchase, they upgrade free to 3 years. If anything fails, they send a courier out to wherever you're working, collect the faulty item and repair/replace and return it to you within a few days. All under warranty. Now that is service!