What year make and model?

Sounds like turn signal stalk is bad re: turn signal.

Beeping could be dirty fuse connection, my 124 did this when applying the brakes.

Low beams??? are the bulbs proven good? Might be bad bulbs.

Good luck and keep us posted...

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

Time to R&R turn signal stalk...BTDT.

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1987 300SDL 314K mi, counting; #22 Head
1999 E300Turbo 405K original miles
1997 E320 180K mi (Son's)
2002 ML320 (Son's)
1998 S320 140K mi (Son's) sold
1985 300SD 311K mi
1984 300D 324K mi (killed by a hit-n-run turd)
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Before you delve into R&R, "twirl" all the fuses. This is a yearly contact cleaning maintenance item not found in the manual . If this doesn't fix it, check the fuses. Not a visual but an electrical check with an ohm meter. "they look OK" isn't good enough. This should get the electrical part working. The having to hold the lever part is going to involve R&R.

__________________
Hanno
'79 6.9 Sold (after 27 years)
'83 280SL, 5 spd.
'94 E320 Sdn. 5 spd conversion
'02 E320 Sdn.(on loan to mom!)
'87 300E (5 spd. conversion) Sold
'05 E500 Wagon