Model year 2000 CL500 is lagging instead hard accelerating when floored, then seems to hiccup at 3500 rpm before releasing its power...Thoughts?

Greetings all,

I hope everyone and their loved ones are doing well.

As mentioned above my 2000 CL500 is lagging (no kick-down) when accelerating with throttle floored, then seems to hiccup at 3500 rpm before releasing its power to redline.

Car seems OK otherwise and drives normally - just doesn't seem to 'give it up' like she used to when pushed.

I'm curious to see if anyone has experienced a similar symptom.

Love the car - Rides like a dream and it's always been a gem for the 12 years of ownership - But the above situation has me perplexed.

SEARCH function showed a couple of possible options, but nothing concrete so I'm inquiring with other owners or any auto mechanics here.

Throttle Actuator?
MAF sensor need cleaning or replacing?
TPS?

Thanks.