E39 sunroof questions

[sparks_E39]

Despite stating after 2 E39's I don't want another one.... anyway I (potentially) am picking up one on Saturday circa 2001. It has the seemingly rare sunroof option. Any pitfalls, or anything to look for? Thanks.

[Hawmaws]

I had a sunroof on mine - loved it. No real issues in 12/13 years.

Only thing to look out for is that the drainage holes in the front corners don't become blocked. Can cause water ingress down the A posts. Fairly simple to fix with a drain unblocker thing and a bit of gentle wiggling.

I think the preventative treatment is a scoot of compressed air every now and again.

[kiethton]

My '03 540i has a sunroof, works as it should and has caused no issues in the 4 years I've had the car