I've just replaced the front Discs and Pads on my W209 CLK 320 (52 plate). I ended up buying genuine parts to ensure that I had no problems fitting them. Got all of the bits from this place:
Mercedes-Benz Parts, Inchcape
I feel it is only right to say that the service I got from them was fantastic. I bought 2 discs, 2 sets of pads, 2 bolts and a fuel filter. Domenico was the chap who delt with my order, top notch. I ordered 2 sets of pads by mistake (thinking the price displayed was for 1 set). Domenico was on the phone to me 1st thing next morning to say he'd cancel 1 set of pads and refund me - without me even asking!! The bits arrived next day by parcel force. I received email confirmation from parcel force and a text message updating delivery details - fantastic.
When the bits arrived I was very surprised to see that not only was everything there, but they had thrown in a brake wear sensor, 2 clamps for the fuel filter, a 13mm screw clamp and 2 disc bolts, F.O.C!!!!!!!! I got discount online and also a further 10% by using a 'promo10' code. In all I paid £221.42. (Discs £93.60, Pads £48.51, Filter £39.89, bolts £2.52 - Plus the VAT)
Excellent service and delivery, highly recommended for genuine parts.
Noticed that the pads were Lucas (pagid?) marked up Mercedes. They came with new metal holders and a sachet of brake grease. All fitted perfectly.
Oh, on the down side, It looks like I'm about to enter into the murky world of torque converter problems. Looks like my converter is goosed. Droning noise at around 35 mph as the lock up engages, then drones under load. Not happy as I've just had an expensive 'B' service carried out where I asked them to change the ATF oil. Fromn the invoice it appears they only did half a job as I was only charged for 4 ltrs oil and 1/2 hr labour. I cant say for definate if the fault was there before as the radio always drowns it out. Spoke to Ollie this morning and will hopefully be arranging my 1st visit to Horndean soon to get it looked at.
really starting to go off this car now as both rear arches are showing signs of rust, along with little spots in various other places. Its only done 51k with full MBSH bar the last B (specialist). Lets hope Ollie restores my faith in the brand.