I suppose this isn't necessarily a Mercedes issue, more a dealership issue, but given my car is a Mercedes I thought I'd post my story and ask opinion/advice, prior to any next moves. There's a long story here attributed to the purchase and ownership of my CL600 since its purchase in November 2014, however here's a potted history: Test Drive - October 2014. Agreed to purchase the car, at advertised price (not a penny off), however with the provision of a 12 month warranty in lieu of 3 month warranty. Also on the premise of a number of issues to be resolved on the car; massage function to be repaired, minor scratches to be painted, vibration from car at high speeds to be put right. Purchase - November 2014. Massage seat (seemingly) fixed, scratches painted, and then upon driving the 100 miles back home the vibration was still present. November 2014 - notified dealer that seat massage operation is intermittent, and car still vibrates at high speed. I put the car into a Tyre specialist, who balanced the wheels, however notified me that the driver front wheel was buckled, hence he suspected that was the issue. Car returned to local Mercedes dealership who repaired the massage function and replaced the buckled wheel. Car returned - vibration remained. Copy of Warranty requested - not provided. December 2014 - the car vibration remained. Car returned to original dealership, courtesy car provided, all four wheels (supposedly) sent to wheel specialist for x-ray and repair. Two rear wheels had "micro-cracks" welded and all four wheels balanced, with new micro-valves provided. All costs incurred by dealership. Car returned. Vibration remained. February 2015 - vibration continuing, car returned to local Mercedes dealership. Mercedes Technician test drove the car and confirmed the vibration. Observational comments made by the Technician and Service Manager that the car had welds on wheels, which they did not recommend. Car then test driven with four new wheels on. No vibration present. Report provided to original dealership (Inchcape Jaguar) identifying ongoing problem and means for resolution. Dealership unwilling to cover the costs of replacement wheels. Original wheels put back onto vehicle. Copy of Warranty requested - not provided. April 2015 - Rear driver side window stops working. Car vibration continues. May 2015 - Driver window stops working. Car vibration continues. May 2015 - Two ECU's fitted to the car to resolve window problems. Copy of Warranty requested - not provided. Local dealership does search for Warranty on the Approved System - Warranty appears to have expired after 3 months of purchase. Repair costs paid via invoice between the purchase dealership and the local dealership. Vibration remains. June 2015 - "Park Assist inoperable" warning appears on dashboard when braking. Brakes temporarily locked on. Vibration remains. Copy of Warranty requested. Supposed warranty provided by purchase garage. Purchase date of warranty not purchase date of car, instead June 2015. June 2015 - "Park Assist inoperable" warning appears, brakes lock on, car not driveable. Car put onto flat bed truck and returned to local Mercedes dealership for repair. Dealership reject work (new transmission control unit) under warranty as warranty not live. I paid for the works (£750) on debit card. Once again warranty details requested from purchase garage, who suggest there must have been a problem with the paperwork. Purchase dealership suggest a resolution to the problems would be for them to buy the car back off me. July 2015 - I still await a reimbursement cheque for the £750 costs incurred. I still await the Warranty Policy Documents, regardless of countless requests. The car still vibrates at motorway speeds. So in summation there's been a few problems. It appears the 12 month warranty was never put on the car at purchase, instead initially just a three month warranty was provided, and more recently maybe an extension has been provided to it. This is clearly in contradiction to the purchase/contract. Although wheels aren't covered by warranty, the vibration was an issue identified at purchase and rectification was agreed, yet this still hasn't been put right. It is now 5 weeks since I paid £750 for the Transmission Control Unit and I still await reimbursement. I also still await the Warranty policy details. I have no desire to trade the car back to the dealership first of all because I love the car, secondly because they're rare as rocking horse ****, and thirdly I think the garage underpriced the car, and the buy back offer from them reflects the depreciation on their sale price. So if anyone has been able to get to the end of this post, what's your opinion? Have I been reasonably patient? Has the purchase garage been reasonable in their attempts to rectify situations? Or is it time I started mentioned legal recourse on this one; namely the Small Claims Court. Any experience or opinion would be welcomed. Thanks.