93 500sel/s500
im having a problem with my car

my mechanic doesnt have anytime to check it out untill tuesday. but i would like to know what the cause of this might be.

heres a description

when i step on the gas the car does not respond it takes off really slow. After a second of the acceleration i feel a kick or two. I just bought this car and i know this is not how its suppose to run.

the only thing i can think of is the TPI sensor. my last car had a similar problem only it would not respond at some speed or rpm levels and at certain speeds it would work well and that was due to my TPI sensor. but this car responds poorly at all speeds.

please any help or leads will be great

Thanks