The 2nd smaller glass in my 2005 X got stuck lopsided (1 side up, 1 side half down). It was going to cost a small fortune to fix.. I ended up just locking the glass closed... It took 5 minutes and required unscrewing the 2 hex screws on either side and poping it out of the tilt mechanism...

The rest of the roof works perfect. I lost the 2nd smaller glass ability to tilt but other than that the main panel works fine..

The e70 should be similar.. why spend a fortune to simply have that 2nd panel ability to tilt 3 inches... You may want to consider just locking it permanently down...

Good luck.
Rob