The easy way to do this, assuming the same layout as the 603 engine, is to remove the electrical connection just in front of the shutoff by rotating the locking collar, removing the plug, then rotate the collar some more and lift it off, too.

Then unscrew the lower nut on the ALDA -- the big square can just behind the vaccuum can. The nut is captive on the top part. Unscrew off the IP, then tilt toward the engine and wrestle out from under the mainfold. This is necessary to reach the second bolt -- at least on the 603 is isn't possible to use a swivel, the one I had at any rate.

Remove the two holddown screws, lift off the old servo, remove the seal from the old one and put it on the new one, then install the new one. Make sure the shutoff lever is engaged and moves up as you put the new servo in place. This isn't difficult. Don't forget the seal -- there isn't a new one with the servo.

Please have a vaccuum source handy when you do this -- as stated above you need to check function. You can also just push the lever down and put your finger over the vaccuum connection and see if it stays down! Better to use vaccuuum.

Re-install the ALDA , vaccuum line, and electrical connection and you are done. Very nice to have the engine shut off with the key, particularly when it is raining!

Also, have a 14mm wrench handy, and have someone else start the car -- if it runs away, crack the injection lines at the injectors to stop it. Fuel will be everywhere, but the engine won't blow up!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!