Took my C Class in for a braking problem that my local garage diagnosed as a faulty vacuum pump. Told it had to under go diagnostics before anything could be done. 2 Faulty sensors were identified, but not related to the braking issue, but had to be replaced before proceeding....Expensive! Colin Ferns evenytually diagnosed the fault as a broken Master brake cylinder, so it was replaced but did not fix the issue. Now I am £1600 poorer with nothing fixed. Long and short of it, I took it away, .........Yes it was the Vacuum pump in the end,.....A salvage replacement that cost me £40, and the rear discs had a build up of rust, £50 to get cleaned up! No acknowledgment of any wrong doing from Ferns,.....No willingness to reimburse anything, in order to placate a loyal customer. For someone who can afford to squander 2 grand and not blink an eyelid, then please go to Colin Ferns........I myself have learnt my lesson and will put my faith in my local garage!