Hi all.
Firstly, does anyone know the difference, other than part number, of the idle stab valve?
Early cars, PT?engine -->M chassis. 078133455A (last known price in UK, £180)
Later cars, PT and ABH M chassis--->. 077133455B (Current UK price, £400+)

are there any major electrical differences?
Interchangeable?

What is the price in the rest of Europe?

85 WR quattro
90 V8 Silver, 91 V8 Black, 93 V8 Lago
93 100e quattro V6. Titan, i think