Is it normal in a E-320?

[JeffreyP]

In my 98-E320, I noticed that after full stop, if I let go of the brake and not apply any gas (there must be a term for this), the car can barely move. It has a hard time making through a very, very casual slope (my short drive way into the garage). It is a little tacky for parking uphill as I need to move up about 2 feet, I have to apply gas, the car surges and almost hits a car in front.
My previous car was a 97 Maxima, and it doesn't feel like this. I understand the MB is 500 lbs heavier, but in the Maxima, it has seated 5 adults and I don't see this problem.
The MB operates perfectly fine otherwise.
Any thought?

Thanks,
JeffreyP