ok i did something today that i never do, i paid someone to change my oil. i cant find the time between bad weather and putting in alot of hours at work. so now ill get on with my problem. i drove the car over to the shop and everything was fine, while i was paying for it one of the guys asked me what the test switch was for (never really thinking anything about it.) once i got in the car and started towards home i noticed that it was shifting really hard almost like it had a shift kit. it did the same thing all the way home. as soon as i get home i called over there and told them who i was and asked to talk to the guy that was working on the car and he told me that the rag got caught on it. the receipt shows everything that they did was adjusted the tire pressure and washer fluid, and did not add any transmission fluid since it was already full. does anyone have any idea what is going on? is there some kind of reset for the 4-matic if the switch is moved? please help!! thanks

after some more searching i guess it wouldnt matter if the test switch was moved or not, but this does not make any sense why it ran one way before i took it there and differently when i leave. anyone??????

Did these retards add some type of oil into your hydraulic reservoir? Hope you took a look at its level before you went in. If you even suspect they added something like ATF or Power steering fluid, or whatever into that reservoir, you better rush to someone qualified to drain and flush the system. Otherwise, try disconnecting your battery for 15 minutes or so, then reconnecting it, and make sure your 4matic test switch is in the normal position before you try starting. The 4 matic computer can be sometimes reluctant to come online after the test switch has been touched. And as far as a rag snagging on the test switch and moving it accidentally to the test position, they are full of S--T. That kid touched it.
dave........

well it turned out to be an cheap easy fix, but there was a lot of thinking involved........vacuum line. it was the line beside the oil filter on top of the motor. with the way the transmission was shifting i didnt realize how rough the motor was running until my wife said something about it and after thinking about it last night while i was at work i new exactly what it was, but just didnt know where it was.