Ok, this is for a 1992 300D 2.5 Turbo euro headlight. They do have the vaccum controlled up/down level option for heavy or light loads. But I need to install the vaccum lines on the car and the switch.

On page 78 of the STAR July/august 2000 issue, it says "Your vacuum source will be the economy gauge line, which you pulled off the back of the instrument cluster. Install a tee in that line and run the new line to the level control switch, whith a check valve...If your car has no economy gauge, use anotehr convenient vaccum source."

Obviously I do not have an economy gauge, so what is another "conveint vaccum source", that I can use?

You can use the multiple vacuum lines that are used to lock/unlock your doors, etc. Look in the engine compartment by the brake booster/fuse box area. You'll find several vacuum sources there. Make sure to install a check valve in-line so the vacuum doesn't bleed off the system.

Satish

A separate vacuum motor controls the central doorlock. The vacuum that is generated by the engine controls the height adjustable headlights. You can practically hook it up to every possible vacuum line you see coming from the engine bay.
You don't want to connect the headlight leveling to the doorlock system since the doorlock vacuum motor only gets engaged once the car is (un)locked.

greetingz,

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1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)