They did not strip off the Grenadiers to form Grenadier Battalions like other countries did.
I hope this helps answer the question about Wurtemburg Grenadiers: Rawkins says:
"The newly formed regiments had a strength of two battalions, each of four
companies. Each company was divided into two züge, with each züg further
divided into two sektionen. The soldiers of each section, shared a common
billet in barracks, messed together and shared a tent on campaign.
The 1st. Company of the 1st Battalion of each regiment was designated the
‘Grenadierkompanie'. In the Württemberg army the Grenadierkompanie was
the senior company of the regiment, equivalent of the ‘Leib-kompanien' of
other armies. The Grenadierkompanien were not elite ‘shock' troops in the
style of other armies of the day, and in organisation, equipment and function
were identical to the musketeer companies, and were ‘grenadiers' in name only.
The Fusilier-Regiment ‘Neubronn' did not have a Grenadierkompanie
until 1811 when the unit officially became the Linien-Infanterie-Regiment Nr 7;
the regiment was intended to be a Prussian style light infantry unit but in fact
was in every other respect identical to the line infantry"