Mercedes Benz repair: Engine Harness for SL 600, camshaft timing, better business bureau

Question
My 94 SL 600 Engine ran hot on the causeway bridge in New Orleans.  The Mercedes Dealership in BR replaced the waterpump, thermostat, v-belt.  Said I should get the Engine Harness replace, cracking (got hot).  Drove fine 440 to Dallas.  Took to Ewing Mercedes, Said did not need Engine Harness need electrical harness $1600.  Put in electrical harness $1600 and check engine lights went off within 24 hour after picking up, r s camshaft timing solenoid,  rt and lft CT Converter $3300, car still running rough, solenoid light back on and wired fan wrong.  9 months later, Ewing wants me to pay for Engine Harness %5,700.  Car 98 65K miles just bought 6 months before ran hot.  One owner and all maintenance was done and a prebuy inspection excellent.  Ewing Advisor was fired for cause and they had to repair other cars both will not repair mine.  I am a woman.  They took $8K in repairs now want another $6K.  Very frustrated.  People are not honest any more.  What should I do?

Answer
well I just got robbed today at gunpoint at my job building custom cars so let me tell you about people these days they are scum anything for a quick buck as far as your problem find a good independant mechanic and get his phone number for a date..LOL no seriously I would advise not going to the place anymore check engine lights come on for a reason, I dont go to the stealership its a joke..Tell them look I just paid 6k in repairs for you to fix the problem otherwise  am calling the Better Business Bureau on you then try to take them to small claims court generally when you get a lawyer or court involved they dont want the hassle they just fix your car and say you want it done right