s class vacuum pump fault

[simonavo]

I have a problem with the vacuum pump system for boot closure etc on my s class. I have searched past topics but this problem hasnt been covered.The mercedes service centre say the pump control unit is faulty (big bucks!). I understand the unit works door locks as well but these are working OK. Does the unit fail on some of the curcuits and not others, meaning its the control curcuits rather than the pump itself. I'm concerned that it may just be leak on the particular line for the boot closure system and the pump replacement may be unesessary and wont fix the problem. I can live without the boot closure for now but will the unit fail completely eventualy. Also can these units be repaired/recon either DIY or professionally. Hope you can help.
Thanks

 

[television]

Hello and welcome, we do need to know what car it is, a 140, 220 or 221

 

[simonavo]

W220

Hi Malcolm

Its a W220 2004 cdi model. Its only just out of warranty is it worth trying to see if theres any goodwill to be had (unlikely I know ,but if you dont ask you dont get!) in them fixing it FOC.

Cheers

Simon

 

[Chas]

I have a problem with the vacuum pump system for boot closure etc on my s class. I have searched past topics but this problem hasnt been covered.The mercedes service centre say the pump control unit is faulty (big bucks!). I understand the unit works door locks as well but these are working OK. Does the unit fail on some of the curcuits and not others, meaning its the control curcuits rather than the pump itself. I'm concerned that it may just be leak on the particular line for the boot closure system and the pump replacement may be unesessary and wont fix the problem. I can live without the boot closure for now but will the unit fail completely eventualy. Also can these units be repaired/recon either DIY or professionally. Hope you can help.
Thanks

This might be the answer....

Check fuse # 62 @ rear fuse box, behind rear footwell illumination lamp (nearside I think)
http://www.detali.ru/cat/oem_mb2.as...GA=722.618&CT=F&cat=66H&SID=54&SGR=089&SGN=07