2001 Mercedes-Benz C320 Other or unknown Problems

“I had a few electrical problems but have now been resolved through many repair shop visits. I have 109,000 miles on the car. Now. The issue that kept occurring is the passenger door handle that keeps coming off. I already replaced it once and the part itself is $350. I can buy the whole door for $300 at the scrap yard. Not sure what to do. I feel like its the glue and maybe the hot humid weather is affecting it? I did have to replace a new battery and thought something was wrong with the car because it drained so quickly. I think the battery was just bad and its been fine ever since.”

“The electronic key presents a safety hazard since it ques in all setting for the driver. While driving the mirrors would change position. The key can stop talking to the car and not allow the car to be started. Sometimes when starting the panel and other inside lights failed to come on, but the car was driveable. The oil level check system would say the oil level is to high, and add miles to the next service point. The big confidence breaker is will this key stop talking entirely to the car while driving? This would surley result in a non-steerable event. …”