[peter2772000]

I dunno that 15*C will make that much of a difference, but it sure as hell can't hurt. As well (and this is a tip from a MB diesel expert, remove the belly pan and engine cover in the summer if you do a lot of stop'n go. The under-hood heat actually cooks the hydraulic fluid out of the special MB engine mounts.

One thing though, on my american cars, you had to retune for it, otherwise you'd get a code after going to closed-sensor mode(when the engine had warmed up). I imagine the same would be true with german cars?