First this to do is to isolate the turbo and the N-75. Use a short section of vacumm hose (8") and connect between the "Vac" port on the N-75 and the vacumm nipple on the main checkvalve. This will eliminate every thing else in the vacumm system. If you get boost your N-75 is operational.

ABS Heavy Duty 096 Car Battery. £ 75.00 Add to basket. Sale! 4. Ampere Hours 74. CCA (SAE) 680. Voltage 12 Length 278mm Width 175mm Height 190mm. The 2004 Volkswagen Golf 5 2.0 SDI has 75 PS / 74 bhp / 55 kW. How much does a Volkswagen Golf 5 2.0 SDI weighs? The Volkswagen Golf 5 2.0 SDI weighs 1252 Kg / 2760 lbs. What is the top speed of a Volkswagen Golf 5 2.0 SDI? The Volkswagen Golf 5 2.0 SDI top speed is 163 Km/h / 101 mph. Is Volkswagen Golf 5 2.0 SDI All Wheel Drive (AWD)?
I got a quick reply by e-mail:"Yes, we do have a 80Ah battery identical to the original". I visited them today. Nice Parts Master who quickly drops me the 80 Ah battery. $ 108 + tax (5%). Parts # 000 915 105 AG. (the first three numbers are different, but the battery is identical, made by the same manufacturer, Varta)
Volkswagen Golf Battery Size & Capacity Volkswagen Golf battery size differs depending on the year of manufacture, trim level, and some other additional factors. Thus, the Volkswagen Golf of the 1999 producing year had the H5-AGM, 47H5, H6-AGM, 48H6, while the latest models feature the H5-AGM, 47H5, H6-AGM, 48H6. . 149 291 190 405 478 426 195 193

golf 5 1.9 tdi battery size