E28 Intermittent Speedo and trunk condensation

[dg <davehg"nospam"@domain.elided>]

Happy New Year to all digesters!

Two questions about E28 (86 535i) problems of recent:

1. The speedo and odometer is starting to cut out. A few times this week, 
the speedo would not work, nor would the odometer or trip odometer. Then, 
suddenly it would. What gives? Is there a speedo cable that may be going 
out, or is this a battery thing? I note the tach works fine all the time.

2. Moisture is gathering in the form of condensation in my trunk, 
collecting on the top of the inside of the trunk lid and the rear shelf. Is 
this normal for this time of year (very cold recently) or is this the 
leaking tail lens gasket/trunk gasket thing?

All answers appreciated.

BTW, to Rob Levinson: How hard is it to install a new amp (in trunk) and 
rewire to all four new speakers? I have a 5ch amp and subwoofer to install 
(it will link up with my recently installed Blaupunkt cd player), as well 
as new speakers and new front tweeters. I've thought of doing the install 
since the dealer wants about $300 for labor and parts (for amp install w/ 4 
guage cable and fuses, plus RCA cable, and for speaker install front, rear 
and rewire, and replace the tweeters in the front door panel). And if so, 
where to bolt the amp? It's a Soundstream.

The head unit install was a piece of cake. Is the amp and rewire doable 
without dissassembling half the car?

- -Dave Green

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