{"nhtsa_id":10207184,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-02-04","date":"2022-01-26","document_id":"LI20.10-P-074284","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Complaint Check engine light illuminated. Fault code P012800 current or stored in MRG1AMGV8 control unit. Cause Thermostat may not close completely Remedy 1-Perform coolant warmup test via fault P012800 and save the results 2-Drain coolant through fine sieve or filter and check for debris. 3-Remove and replace coolant thermostat. Check for any debris in thermostat or connections on engine. If debris found in step 2 or 3, flush engine and take pictures of debris. 4-Refill cooling circuit and clear faults. Warm engine during test drive. Allow to cool 6 hours. 5-Repeat coolant warmup test and save results. If LI was previously applied to the vehicle open a PTSS case with the below documents. -Initial quick test -MRG1AMGV8 control unit log -Coolant warmup tests before and after repair from previous visit -Coolant warmup test from current visit","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10207184-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10207184-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10207184","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":["P0128"],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"S 500 4MATIC","year_from":2022,"year_to":2022,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 580 4MATIC","year_from":2022,"year_to":2022,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 680 4MATIC","year_from":2022,"year_to":2022,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}