Has anyone used this company,which is the MB approved repairer in the Plymouth area? An SLK32 AMG which I am purchasing from an independent trader is going into this repairer for some bodywork repairs including rust on bootlid and rear wheel arch. The trader seems to think that authorisation from MB is quite quick. When I phoned MB Plymouth I was told it was about 6-8 weeks. Having pointed this out to the seller he advised that if authorisation was this slow he would pay for repairs himself at Hallgraves and Lee. Would this prevent me making further claims for rust repairs in the future? Car has full MB history with last service in December 2008.