My father use 190E and W124 E300... From my humble opinion, if you want to cut your throat you can send the car to workshop who claim themself 'Specialist Merc', usually I buy the part at chop shop (the price almost same like toyota, nissan, honda) and install it at my workshop ( I mean workshop bawah pokok), but if electrical or electronic problem usually I send to 'Merc Workshop'.... Some workshop they try to rip off Merc User because in their mind Merc user are rich people so they can hantam kau kau.. for gear box problem they quote 7K??? Rather buy Toyota 1JZ engine put in.... so be careful, but from my humble opinion also SOME rich people are very DUMB about car, thats why they easy get fool by those people in workshop.. What we can say they have money to pay... Cheers!