Absolutely...just had the same dilemma myself...went to autocentres..they, through the sunday times were doing a half price mot (£26.50)...got great independent advice and took it to the stealership...at least i know that the stealer didn't pile up issues out of warranty for me to pay for......got a sump washer replaced and various other things checked as a result of that independent mot...
Not that this will come as news to anyone on this forum.....there are a few unscrupulous dealers out there you know....
