Diesel Benz
MB Enthusiast
Def only five digits in my manual which is worse than useless, since you might as well just enter the town and then key in street, etc. I cannot believe that such a sophisticated system costing a ridiculous two thousand quid from a premium brand car maker does not accept a full postcode. It's not as if postcodes are new!
You seem to know everything but it might be useful for some others to note that this COMAND does support full postcode entry for almost everyone, just not for you in the UK. ROW is mostly using 5 digit post codes (I admit that this makes postcodes a bit useless for navigation, but every country has a street address that can be used for navigation and is more accurate).
MB is introducing support for full UK postcode, it just looks like the UK could change to 5 digit codes more quickly than MB is able to extend their UK support.