The break light switch problem was easy. When my fob key broke the problems began, I sent the bad key along with the eis to a benz parts supplier, he just took my money along with the key and eis which made the car sit for 8 months. I was able to buy set of fob key.eis.esl and ecu,the car did start but so many problem started to pop ùp, one is the engine fan error in the dash, and it only blow very very hot air. Recharge the ac and fix all leaks and still nothing, engine fan error still there , I can find the cause, I tried buying a new fan module but still problem persist.. running out of money because of the pandemic, I just want to fix the ac and error so I can sell the stupid car. And find peace