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Yes we have replace few of brake diaphragm travel sensor (control unit have to know how far the brake booster diaphargm travels)on 163 or 210 but also brake light switch is very common problems,the correct way dignosis BAS,ESP is read the code first then go after each code watch live data of the system to find out witch sensor cause problem today cars you must have the right tool to dignosis you can't compare 2004 car to 1994 car Mercede make a jiant step in ten years,just like your cell phone think about the cell phone you have ten years ago and the one you have right now what a different( phone E-mail,message,photo,on-line,sport news,weather,GPS,ring tone.......) by the way the travel sensor is available seperately. hope this help.
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MB STARS Master Guild Technician,17 years MB tech
14 years independent shop owner
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