Reputable garage near Northwood, suggestions?

[ST150HB]

Good afternoon PHers,

A work colleague of mine has recently bought a 2004 Mercedes C Class, and is looking to give it a good service. As I only work in Northwood Mon-Fri my local knowledge isn't too great, so was a little stumped when he asked for suggestions!

I look forward to hearing your recommendations.

(Apologies that the description of vehicle is vague, as he hasn't given the best description to me!)