I'd be happy with a MB parts dept I could actually even get thorough to!
My nearest (Macclesfield) are a complete waste of time. 5 calls in the last two days and failed to pick up on all of them. Rang the sales line and surprise surprise they answered immediately. Said he would get them to call back in the next 1/2 hour. 8 hours later, not a word. All gloss and no substance.
Advice from the brilliant guys at Nick Webster Mercedes got me out of trouble and a call to Mercedes Stoke sorted the part.