Benzworld.org - Mercedes Benz Discussion Forum - View Single Post - So I played around with my closing assist pump this evening.

guydewdney · 05-24-2004, 02:32 AM

this is quite clear - the pistons ont he assis mechanism in the trunk are dead / leaking.

the pump looks at how long it takes to achieve a certain pressure - if its too long it cuts off that circuit. it does it after the second time cos it needs to be sure that its not a one off occourance. the reason the lines were plugged was to fool the pump into thinking the mech was still air tight.

replace trunk pull close mechanism

parts :-
220 800 05 75 - 'element' - i assumer this is the cylinder.. all from a 1995 S 500 (orig part number was 140 800 20 75) - 43 dollars roughly.
202 800 20 75 - pawl release (i asssume somthing to do with unlocking)
202 800 03 22 distributor (in the trunk lid - i assume some sort of valve block)

05-24-2004, 02:32 AM	#2 (permalink)
guydewdney BenzWorld Member Date registered: Dec 2003 Location: Tring, Herts, UK Posts: 212	RE: So I played around with my closing assist pump this evening. this is quite clear - the pistons ont he assis mechanism in the trunk are dead / leaking. the pump looks at how long it takes to achieve a certain pressure - if its too long it cuts off that circuit. it does it after the second time cos it needs to be sure that its not a one off occourance. the reason the lines were plugged was to fool the pump into thinking the mech was still air tight. replace trunk pull close mechanism parts :- 220 800 05 75 - 'element' - i assumer this is the cylinder.. all from a 1995 S 500 (orig part number was 140 800 20 75) - 43 dollars roughly. 202 800 20 75 - pawl release (i asssume somthing to do with unlocking) 202 800 03 22 distributor (in the trunk lid - i assume some sort of valve block)