steering box e420
 

Need the groups help. Had car at indy for fluid changes ( breake,oil,and coolent), also had small power steering fluid leek. Indy replaced power steering plugs at rack gear assymbly. the good news is the leek is gone the bad news is my steering feel verry heavy, the steering wheel does not return to netural after turning to right or left . what adjustment did they do to make wheel so tight. cant get back to indy untill nex thursday. need groups advise on if I'm doing any damage to car if I drive it this way.

Thanks in advance

MR.Lucky

fluid
 

are you using mercedes spec. p/s fluid? i'm new but i do know there is a difference in p/s fluid