BenzWorld Senior Member
Date registered: Oct 2005
Vehicle: W163 ML320, W220 S500, R230 SL600TT, R170 SLK230, W140 S500, More
Location: America the Beautiful
Mentioned: 3 Post(s)
Quoted: 48 Post(s)
My engine shut off at a traffic light and again when parking and I had a check engine light illuminated... The first thing I would do after the spark plugs, is clean the MAF (mass airflow sensor) using the proper exact cleaning spray product. Because of the size of these vehicles, it is not easy to reach, you need something to stand on but it can be accessed, removed, cleaned and put back. Use a code reader and clear the codes before start-up. Maybe your check engine light will go off and it will run fine again. If not, a new Bosch replacement is about $72 on Amazon, they have some other brands that are cheaper, but for me I would get the Bosch unit. I cleaned mine, cleared the codes (It indicated rich fuel mixture both banks) and it has been fine since. It's only been a day though. After a week of no check engine light and no stalling, I will declare it a success. If it acts up again within a week I'll buy a new MAF.