Quote:
Originally Posted by lsmalley
By the way, you never really explained the symptoms your car is having.
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Nope I didn't because I didn't really want to confuse.
I'm quite surprised it doesn't hold vacuum because this suggests it does
EZL & Vacuum?? - Mercedes-Benz Forum
Anyway (just in case) problems are two fold
1) The semi-automatic blower motor always runs but occasionally when there is a sudden change of engine revs the fan switches itself off - I'm guessing this is vacuum related (engine load)
2) Real problem - I don't really care about problem #1(!) - is an unwillingness to idle during use.
Start the engine - idles fine
After driving the car the engine will more often than not idle fine too
However when driving the car - change from low gear to high (say) or change down from higher gear to lower the engine revs fluctuate wildly about idle until they "find themselves" - sometimes during this process the engine will stall.
(It might be the fuel pressure accumulator - pretty sure it isn't external electrical to the EZL as I've checked that side quite extensively previously)