The wires are for heater elements to preclude freezing up in colder climates. You may not care to hook them up again.
I am curious about how you get them out. My 1986 190E 2.3-16 has poor flow out of one assembly and none out ouf one of the nozzles, making the spray pattern a poor compromise for slow and high speed driving. I tried to coax them out and felt like I was going to break the things or leave marks on the hood. Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)