HI everyone, I have an issue with my GL450 that has to do with engine getting jammed and won't start, then a local repairer said that the combustion chamber is been supplied too much fuel/gas and that in other to fix this i have to change the engine control module, the central gate way and possibly the air flow meter. Sound's ridiculous to me hence my question today. 1. Is there any relation between the engine control unit ( brain box) located on top of the engine to Central Gateway Under the driver seats or the air flow meter. 2. Can the brain box cause the supply of fuel to exceed what is normal in the combustion chamber. 3. Once the engine gets jammed, they use regular engine oil poured in small quantities direct into the spark plugs Chambers ( without the plugs present) and manually turn the engine with 27sockets and bar. Once movement occurs, they couple it back and the car will start again. What is the cause if this please people. And what risk am I exposed too.