Anybody experienced anything like this...Yesterday I couldn't unlock my GLA, no response from either keyfob so I tried the physical key to unlock the door. This unlocked the door but didn't unlock the central locking or deactivate the alarm which went off. I tried the fob in the dash and was presented with a display full of warning lights and error messages. The engine wouldn't start, or even turn over. Couldn't find anything in the manual, so I called recovery. As promised over the phone, an engineer turned up after a couple of hours. I didn't see everything he tried, but he did charge the battery (although he said that wasn't the fault). He also checked the error logs (he said there were a lot, but nothing to cause this), he'reset' the ECU by shortingthe battery terminals (battery disconnected) and exercised the electrical connections on the ECU. He was then able to lock/unlock the doors, deactivating the alarm and central locking. He was then able the change gear and disengage and engage the parking brake. This was important as it meant the car could be recovered. He re-seated a couple of relays in the fusebox (in the passenger footwell). The car still would not start.He arranged for the car to be recovered, secured over night (as it waslate)and transported to the dealer.The dealer called me today to let me know the car was ready for me to collect. They said there were no error logs showing and asked If I'd had any work done asa couple of relays were installed incorrectly. I told them the engineer had pulled some relays and he had reset the ECU which was presumably why no errors were logged. Either way, when the relays were refitted, the car started.Assuming the engineer mis-fitted the relays (It was dark any wet when he was here, he may not have refitted them correctly) and besides, the problem was alreadypresent.I don't believe any problem was found and as such it may recur. It's alsopossible it isa one off. Time will tell.