I'll assume by front engine cover, you mean the black plastic cover on the top front of the engine...
Chassis is actually 140.033.
Yes, it has the 38 pin connector inside the box behind the firewall on the right hand side. I do have the plug on page 12.

__________________
All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic