Car has 130k and trans seems fine except shift into top gear is sluggish, ie. it takes a second or two to complete. Any ideas of the cause/cure?

Have the adjustments checked, if this does not help, it would not be uncommon for you to have the beginnings of a worn out tranny. These were this way for some reason.
(coupes)

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Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

Odd... Could it be the engine or trans has moved and now the adjustments are out? Perhapd the coupes are more prone to this due to a different mounting arrangement? I have no idea if they do, just a thought.

My 300CE has 174,100 miles on orginal trans. and its shifts sweeeeet. Ummmm tho overdue a fluid flush.

As Benzmac said, I'd get the adjustments checked, especially the trans. modulator which could be faulty.

Bri