Where is it? Tests to be run? Man it's hot in TX, need AC. Please help....

Tests are done at the blower motor regulator. UNDER hood, removal of the air intake is required.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

more details?

It helps to do a search..
http://www.peachparts.com/Wikka/W140BlowerMotor

thanks muchly. Off to the shop I go!

So I took it the shop(certified MB shop), they came back with- needs new fan motor, fan and fan regulator(as one assembly). Parts- $950, labor- $150 +TT&L. Total around $1200. No thanks! So I took everything apart(as per directions), disconnected the regulator and fan leads, and jumped the fan from another battery. It fired right up. Bad regulator, I presume? Any insight?

Thanks in advance....

The lkely cause is the regulator, the next could be a binding shaft on the motor. The regulator is in the ground side not the posetive side

Correct!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Thanks! Regulator ordered! Be here tomorrow. I'll let you know if it worked.
Have an outstanding day!