You can indeed pinch the lines and empty the bottle and replace Mr VRS! And correct in that we could have sucked out a bit of the extra coolant after vacuum ffilling.

FWIW, I did it without even pinching the lines. The top line is empty when engine not running and can be removed without leaking. The bottom line won't drain if it's above the original fluid level, so I just 1. Removed top line, the electrical plug and the two screws holding the reservoir in (don't drop em). 2. Lifted it up and tilted it back (with cap on and coolant still in it) until the big hose was above the original coolant level.. 3. Removed the clamp on the big hose. 4. Got the new reservoir ready.. 5. Slide the hose off the old reservoir continuing to hold the hose high, and set the old reservoir aside still on its back (just nestled in engine bay).. 6. Attach the new reservoir to the hose, re-apply the clamp. 7. Put the new reservoir back into its place, then pick up the old one and align the bottom bottom opening over the new reservoir, and tilt it back upright to drain coolant from old to new. 8. Reattach upper line and clamp, electrical plug, put two screws in.. check coolant level.. done. Took longer to type this than to do the job..

@@daemn42facts. Just read this and about to attempt 🫡

We will add it to the list pebjr!

Yes, so don't torque the cap on. The cap snaps when it is fully turned to the closed position after about 2-3 turns I think. Also wet the o-ring or filler neck with some coolant to make it easier to tighten the cap back on and provide a better seal.

Hi Ned, the capacity for the MK4 is 5L.