I called Proctor to get a quote on replacing the battery in my Mercedes Gl350. I was told that with parts and labor I would be looking around $400, so I took my car in the next day. I was told that my car would take about 45 minutes. I got a phone call shortly after saying my car would need the “more expensive” battery and that it would end up costing $526. I agreed, completely trusting them that the battery being installed was more expensive than the one that was previously quoted. I returned with my two young kids and just quickly signed the papers, paid and left. I looked at my receipt in the car and realized they had charged me $125 for labor, $62 for a diagnostic (a dead battery, in which I told them it was dead), and $38 for supplies (??). Meanwhile the battery was around $270, the price of the original battery discussed, not a more expensive one. I was shocked!! I feel so taken advantage of, and so disappointed. My mother in law called, as she has worked for Mercedes for a decade, and told them that their charges were outlandish and she had not seen that in all her years at the actual Mercedes dealerships. They finally agreed to send me a check to refund the diagnostic fee and the supplies fee, and I will take this review down if and when I get this check. But beware if you are a distracted mom or look like you don’t know anything about cars (both me!). It’s so unfortunate to see people taking advantage of hard working people in tough economic times like these.