I have a 1999 E300 TD. The seals in my injection pump are leaking like crazy. I think I'm leaking more fuel than I'm burning. Seems like a common problem as a result of using ultra low sulfur diesel.

Anyway, ordered the Orings and crush washers, but I need the splined socket to remove the injectors on the pump side. Some retailers are calling this a "32 spline socket" and some are calling it a "33 spline socket". Which one is it? I imagine if it's one spline off, the socket wont fit.

Can someone tell me which is the correct socket size and best place to buy it?

As always, you guys / gals are awesome. Thanks for the help!

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1999 E300 Turbo - 112K miles
1987 300D Turbo - 89K miles
1984 190D 5spd - 152K miles
1969 220D Auto - 170K miles

Tool Rental Thread



IP delivery valve, splined socket......................pdrayton..........................$5.


IP delivery valve, splined socket.....................redassag00......................$10.

IP delivery valve, splined socket.....................dieselgreg........................$10.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

All well and good if renting, but I want to buy one.
Is it 32 or 33 splines?
Peachparts says 32
Another trusted source says 33.
Please advise

Mercedes BOSCH pumps use a 32 spline tool. Cost depends on the quality of the tool of course.