Re: Possible alternative.
As noted, REALOEM lists the DJet's throttle valve switch as
13631358436. This supposedly corresponds to Bosch number
0 280 120 035. A further search reveals a Euro site listing a corresponding Mercedes part number:
35454924 http://boschserviceweber.pl/boschparts/kompatyb/0_280_12-17.htmpolish Unfortunately, the number offered does not
readily reveal any Mercedes model/s that actually used that part number. :cry: It may be that the number is incorrectly posted or just plain erroneous.
Further information, if available, would be appreciated.
Having located a spare 035 switch has resolved my immediate concerns. Because the issue is likely to recur, a few observations follow.
The printed circuit boards are the primary wear area on most switches. Switch 035 uses circuit board part number 1 288 310 032. It is possible another switch uses this same board or that another switch uses a board that could be adapted to the 035 switch. They appear to be dimensionally similar. FWIW, switch no. 030 uses board no. 1 288 310 009 and switch no. 039 uses board no. 1 288 310 023. A cross reference chart, if available, could prove helpful here.
No effort has been made to determine the extent of the differences between the various circuit boards although some are obvious as when there is an additional circuit.
The plastic pieces that fit the throttle shaft appear to be the same on all the switches,
except that some are notched differently to accommodate different throttle shafts. To the eye, it is obvious that the 035 plastic receiver will fit other switches and vice versa. They are secured to the board by a simple "C" clip. While this would seem to make all switches theoretically Csi-friendly, most throttle shafts do not rotate in the same direction as the Csi. (The back side of each switch bears an arrow indicating rotational direction.) The 035 switch has and arrow indicating CCW while most of the other switches have arrows pointing CW.
FWIW, switch 030 fits the Csi throttle shaft and operates in the same direction as the Csi. The 030 has a 5 terminal connection rather than the 035's 4 terminals but the Csi's stock female 4 connector will fit the 030 switch (leaving the top most terminal exposed).
No effort has been made to research the issue further but it seems a fair guess that this extra connection and circuit is not used by the Csi's D-Jet. Since the Csi's rubber boot will not fit the wider switch, electrical tape and/or dielectric grease to protect the exposed connections from the elements might be a good idea.
Disclaimer: absolutely no representation is made that this workaround will work on all Csi's. As they say, your mileage may vary, but it seems to work on the one test subject. How this alternative switch affects overall fuel delivery and consequently, overall engine performance, remain to be seen. Perhaps this information might benefit someone in desperate need of a switch that works. Since the OEM may still be available (at a price)
it may still be the best approach. Then again, sometimes the road less traveled may be the better road. :wink:
Good luck to any/all who may try this.
Danke.
PS:
Thanks to Aussie Faq'r. To the best of my recollection, the 3.0si/ 635 switch is for an L-Jet (different t-shaft rotation/configuration) and not a direct replacement.
