Getting closer to the truth:

All these forced induction engines are under 1 bar or 14.7 psi ,so they would be sucking air through the EGR filter not blowing.

Not a 98-99 but it does give a comparission:

What turbo was installed on the 98-99 ?

83 300 sd Engine 617.95 Turbo Diesel
Turbo -Garret TA 0301

1000 rpm/100 mbar - 4200 rpm/700-730 mbar.

And the 2003 (Twin supercharged Gas) E55 AMG engine makes a towering 469 hp and a massive 516 lbs.-ft. 0-60 mph in 4.5 seconds.

It Generates a maximum of 11.6 psi (or 0.8 bar) of boost pressure. .