ML 63 2006 W164

Question

Hi Guys
I have changed my 40amp fuse and regulator for the airmatic suspension on my Ml 63 06 model.
When I started the vehicle it cut out after 10 secs and wouldn’t start again. The battery is showing good charge and I have checked all fuses but still have no luck.
Would it be one of the regulators (I) for the stater or could it be (D) for the engine?
The car is stuck in the garage with the front end dropped to the ground due to no air in the bladders, frustrating enough without the starting issue as well.
Would appreciate any ideas recommended?
Thanks Stu