[508] Automatic gear knob dimensions

[the-termin8r]

Hi all,

I have a bit of an odd favour to ask of anyone with an automatic 508. Could you measure the dimensions specified in the image please? "A" is from the spine to the furthest-forward point of the protrusion on the top. "B" is from the approximate centre-line of the mounting shaft to the same protrusion.

The shape of the one on my C5 means that when the car's in park there's almost no space between the knob and radio fascia. That in turn means that I can't actually leave anything in my DIY cup holder. My thinking is that if the 508's knob is significantly smaller I might have enough clearance but I don't want to spend money on one only to find that it's also too big.

Cheers.

[mickthemaverick]

Just a bizarre thought Rob, can you spin the knob round 180 so the straight spine is toward the radio?

[the-termin8r]

I had that idea too, I'd have to pull it off and see. Though with that being said, if it's anything like the knob on my previous manual it'll need the jaws of life. I don't want to put repeated unnecessary strain on the mechanism. I'll see if I can find any videos that show the mount in detail.

[the-termin8r]

For anyone in the future, A is ~57mm and B is ~32mm. I ended up buying one from a breaker. Annoyingly, despite fitting on the shaft of the X7, it's still too big for my purposes. So a total waste of 24 quid. Mounting the original backwards is also a no-go because the shaft is keyed.