The sunroof lube IS expensive, it is only sold by Mercedes Benz in huge tubs for about $39-$50, or something, only useful for the shops to buy.

BUT try Rusty at www.*************** (I think that is the place) or a couple of others, I have heard that they are willing to sell you a small film cannister worth of it for $10 or less.

Enough for a complete lube of the track rails - which is a neglected but actually recommended job for these cars.

My mechanic did it this spring but broke the sunroof clips in the process.

The sunroof lube is SPECIFIC for these sunroofs - you can't use something else. I am sory about that

I hope you will let us know if you score a small bit of sunroof lube.

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)