They do seem focused on our brand, that's for sure. I'd just dig a bit as to how many X5's they've worked on with these issues and how far they've gone into the bowels of the engines they've seen. Not many people spend big coin on levers (if that is indeed your problem). If you aren't careful, you'll end up replacing a lot. Most start with easy things - battery, alternator, coils, plugs, sensors. Then move on to control units and other pricey bits without a guarantee. You may go through all that to find it is the levers and unless you go all the way with the levers, no guarantee it will fix it either.

If there is even a hint that it may be levers, try the software fix for them and see if that cures it. You may get away with the software fix in the cold months and then return it to normal during the warmer months. I opted to live with the occasional restart and left the software at the 0.3mm setting.

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Daily Drivers:
- 2008 535i, 320,000km
- 2004 X5 4.4, 01/2004 production, 420,000km
- 1997 328i, 350,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2013 Ski-Doo MXZ X 800 E-TEC, trail can
- 2007 Ski-Doo MXZ Blizzard 800 HO
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E