I have a 1998 E320W that I have three repeating issues with.

1st the windscrean smears very badly in light rain (bloody dangerous at night. The dealer has replaced blades 4 times and washer fluid twice. They tell me that is all they can do. (I have never had the car in a car wash)

Second, Automatic Climate control either blows too cold or too hot. The dealer says that they cannot find a problem. They say that by keeping the temp at 72 I am confusing the system.

Third the ASC light comes on once in awhile. It goes off when I turn the car off. The dealer cannot find a problem.

Any advice would be greatly appreciated.