 Never buy first year of new model. The main problems are only 8 keys allowed to be made. I had 6 keys replaced first year by Mercedes who never told me that once you hit 8 keys the whole locking system must be replaced for $4500. Should have been a recall. I sued in small claims court and won. Windows switch bad in all of them. I have replaced 4 times they only last 3 months. Should have been recall. They knew these problems all along but it was cheaper for them if people sue then do a recall. 