approximately 9,700 model-year 2012-14 mercedes-benz ml350 bluetec 4matic and ml550 4matic suvs; model-year 2012-15 ml350 4matic and ml63 amg 4matic suvs; model-year 2013-16 gl350 bluetec 4matic and gl550 4matic suvs; model-year 2017 gls350d 4matic, gls450 4matic, and gls550 4matic suvs; model-year 2015 ml400 4matic suvs; model-year 2016 gle400 4matic, gle350 4matic and gle450 4matic coupe suvs; model-year 2015-16 gl450 4matic suvs; model-year 2013-14 gl450 4matic suvs; model-year 2013-16 mercedes-amg gl63 4matic suvs; model-year 2017 gls63 4matic suvs; and model-year 2016 gle63 4matic, gle63s 4matic and gle63s 4matic coupe suvs equipped with active curve system
the problem: in certain driving conditions, if the oil level in the acs reservoir is below the minimum level, the oil may foam and leak out of the vent holes in the reservoir cap, which in the presence of an ignition source can increase the risk of a fire.
the fix: dealers will correct the oil level as necessary and replace the reservoir sealing cap to prevent oil foam from leaking out for free.
what owners should do: mercedes-benz will begin notifying owners with an interim notification in june and a subsequent letter when the fix becomes available, expected in august. owners can call the automaker at 800-367-6372, the national highway traffic safety administration's vehicle-safety hotline at 888-327-4236 or visit its website to check their vehicle identification number and learn more.
need to find a dealer for service? go to service & repair to find your local dealer. click here to schedule a free recall repair at your local dealership.
's editorial department is your source for automotive news and reviews. in line with 's long-standing ethics policy, editors and reviewers don't accept gifts or free trips from automakers. the editorial department is independent of 's advertising, sales and sponsored content departments.