Update - dealer principle rang they’re paying for the work. Seems a coincidence he calls just hours after I went around leaving bad reviews on ever site they use. Thanks for the advice everyone.

Sorry I am listening, just completely new to chasing this through the appropriate legal channels, never been "done over" by a dealer before since I'd previously bought all my cars brand new from Vauxhall who've always bent over backwards in terms of customer support and warranty. I've raised the issue with the finance company, who are presently chasing it on my behalf. Should I also send a letter or email to the dealer with a copy of the invoice or something? Thanks.

Update on this, thanks for everyone’s comments. AA came back saying they won’t cover it under the ground of the vehicles “service life”, car has never missed a service all by the main dealer and 92,000 miles. I contacted the selling dealership who said they agree with the AA’s decision and won’t be paying for the repair and I quote “because no part has actually failed and it was in fact just a noise, we won’t be covering it... at the end of the day they are used vehicles”. I’ve raised the dispute with the finance company who I bought the vehicle via. The garage the vehicle is being repaired at is also sending me an email stating they believe the fault to have been present at the point of purchase. Any help on this id appreciate, here is an email I got from Mercedes-Benz regarding the timing chain “Thank you for contacting Mercedes-Benz Customer Service regarding the change cycle of your timing chain. One of the main reason Mercedes-Benz use a timing chain is due to its physical properties that make it superior to the belt, as a manufacture we have done excessive testing of the chains and there is a possibility of the chain lasing the life of the engine this is why the is no set service schedule. We do advised that the is a possibility of the surrounding chain guids to wear creating noises and other characteristics that would indicate the timing chain need to be checked. Should you have any further requirements please do not hesitate to contact me or any of my colleagues.“

Just spoke to Mercedes customer service, lady on the phone said she’s going to write an email stating it’s a none service item.. let’s see how it goes! Thanks for the advice

Hi everyone, Thanks for your time. on 26th May 2018 I purchased a 2014 Mercedes-Benz E220 from V12 Sports & Classics Hinckley. A large dealership with multiple branches. I’ve owned the car now for just over two and a half months, and it has began to develop a loud metalic rattle on startup when the engine is cold. Initially I wasn’t too concerned as the car had a 128 point check from the AA prior to being sold and came with 3 months warranty. after calling around a few Mercedes specialists, they all concluded the same point... the timing chain was failing. I booked the car in to a warranty approved workshop I’ve used in the past and they diagnostic the issue as being the timing chain, they accordingly contacted the AA warranty or “Motorway Direct” seeking authorisation to repair the fault. They responded with “ask the customer to give authorisation for a strip down and send us the findings”. I obviously had no choice at this point, and to get to the point whereby they could supply the evidence the warranty company wanted, it was a complete engine removal and strip. they send off all the relevant pics and videos to the warranty, whom come back to say we are sending and independent inspector to have a look at the car. The inspector comes out and then submits a report to the warranty company suggesting it’s “Wear and Tear”. The car has 92,000 miles, a full Mercedes-Benz service history and has never been late for a service. I contested the decision since I’d now be forced to pay the £1650 bill to complete the job given the engine is now already out of the vehicle, but they said their decision was set. Not feeling too concerned I contacted the selling dealership V12Sports and Classics feeling confident after reading they are liable for the first 6 months according to the consumer code, they came back after a few hours of deliberation to say they sided with the AA warranty and weren’t going to contribute or pay for the work and advised I seek assistance from my finance HP provider. I’m at a total loss, I feel somewhat that my rights have been violated and have had wrong done to me here. How can they class timing chain failure as wear and tear, if it’s stretched it’s failed... even then it doesn’t happen in the 2,000 miles or 2 1/2 months I’ve owned the car... what’s my rights here guys? Thanks!